Get rid of custom ExceptionRule methods

The only remaining methods on ExceptionRule after this are methods that
also exist on ExpectedException, which will allow us to, in the next CL,
swap out the one for the other and then run the automated refactoring to
turn it all into assertThrows/expectThrows.

Note that there were some assertions about root causes that couldn't
easily be turned into ExpectedException invocations, so I simply
converted them directly to usages of assertThrows/expectThrows.

-------------
Created by MOE: https://github.com/google/moe
MOE_MIGRATED_REVID=178623431

javatests/google/registry/tools/UpdateDomainCommandTest.java

@@ -192,7 +192,8 @@ public class UpdateDomainCommandTest extends EppToolCommandTestCase<UpdateDomain
 
   @Test
   public void testFailure_duplicateDomains() throws Exception {
-    thrown.expect(IllegalArgumentException.class, "Duplicate arguments found");
+    thrown.expect(IllegalArgumentException.class);
+    thrown.expectMessage("Duplicate arguments found");
     runCommandForced(
         "--client=NewRegistrar",
         "--registrant=crr-admin",
@@ -203,19 +204,22 @@ public class UpdateDomainCommandTest extends EppToolCommandTestCase<UpdateDomain
 
   @Test
   public void testFailure_missingDomain() throws Exception {
-    thrown.expect(ParameterException.class, "Main parameters are required");
+    thrown.expect(ParameterException.class);
+    thrown.expectMessage("Main parameters are required");
     runCommandForced("--client=NewRegistrar", "--registrant=crr-admin", "--password=2fooBAR");
   }
 
   @Test
   public void testFailure_missingClientId() throws Exception {
-    thrown.expect(ParameterException.class, "--client");
+    thrown.expect(ParameterException.class);
+    thrown.expectMessage("--client");
     runCommandForced("--registrant=crr-admin", "--password=2fooBAR", "example.tld");
   }
 
   @Test
   public void testFailure_addTooManyNameServers() throws Exception {
-    thrown.expect(IllegalArgumentException.class, "You can add at most 13 nameservers");
+    thrown.expect(IllegalArgumentException.class);
+    thrown.expectMessage("You can add at most 13 nameservers");
     runCommandForced(
         "--client=NewRegistrar",
         "--add_nameservers=ns1.zdns.google,ns2.zdns.google,ns3.zdns.google,ns4.zdns.google,"
@@ -230,9 +234,8 @@ public class UpdateDomainCommandTest extends EppToolCommandTestCase<UpdateDomain
 
   @Test
   public void testFailure_providedNameserversAndAddNameservers() throws Exception {
-    thrown.expect(
-        IllegalArgumentException.class,
-        "If you provide the nameservers flag, "
+    thrown.expect(IllegalArgumentException.class);
+    thrown.expectMessage("If you provide the nameservers flag, "
             + "you cannot use the add_nameservers and remove_nameservers flags.");
     runCommandForced(
         "--client=NewRegistrar",
@@ -243,9 +246,8 @@ public class UpdateDomainCommandTest extends EppToolCommandTestCase<UpdateDomain
 
   @Test
   public void testFailure_providedNameserversAndRemoveNameservers() throws Exception {
-    thrown.expect(
-        IllegalArgumentException.class,
-        "If you provide the nameservers flag, "
+    thrown.expect(IllegalArgumentException.class);
+    thrown.expectMessage("If you provide the nameservers flag, "
             + "you cannot use the add_nameservers and remove_nameservers flags.");
     runCommandForced(
         "--client=NewRegistrar",
@@ -256,8 +258,8 @@ public class UpdateDomainCommandTest extends EppToolCommandTestCase<UpdateDomain
 
   @Test
   public void testFailure_providedAdminsAndAddAdmins() throws Exception {
-    thrown.expect(
-        IllegalArgumentException.class,
+    thrown.expect(IllegalArgumentException.class);
+    thrown.expectMessage(
         "If you provide the admins flag, you cannot use the add_admins and remove_admins flags.");
     runCommandForced(
         "--client=NewRegistrar", "--add_admins=crr-admin2", "--admins=crr-admin2", "example.tld");
@@ -265,8 +267,8 @@ public class UpdateDomainCommandTest extends EppToolCommandTestCase<UpdateDomain
 
   @Test
   public void testFailure_providedAdminsAndRemoveAdmins() throws Exception {
-    thrown.expect(
-        IllegalArgumentException.class,
+    thrown.expect(IllegalArgumentException.class);
+    thrown.expectMessage(
         "If you provide the admins flag, you cannot use the add_admins and remove_admins flags.");
     runCommandForced(
         "--client=NewRegistrar",
@@ -277,8 +279,8 @@ public class UpdateDomainCommandTest extends EppToolCommandTestCase<UpdateDomain
 
   @Test
   public void testFailure_providedTechsAndAddTechs() throws Exception {
-    thrown.expect(
-        IllegalArgumentException.class,
+    thrown.expect(IllegalArgumentException.class);
+    thrown.expectMessage(
         "If you provide the techs flag, you cannot use the add_techs and remove_techs flags.");
     runCommandForced(
         "--client=NewRegistrar", "--add_techs=crr-tech2", "--techs=crr-tech2", "example.tld");
@@ -286,8 +288,8 @@ public class UpdateDomainCommandTest extends EppToolCommandTestCase<UpdateDomain
 
   @Test
   public void testFailure_providedTechsAndRemoveTechs() throws Exception {
-    thrown.expect(
-        IllegalArgumentException.class,
+    thrown.expect(IllegalArgumentException.class);
+    thrown.expectMessage(
         "If you provide the techs flag, you cannot use the add_techs and remove_techs flags.");
     runCommandForced(
         "--client=NewRegistrar", "--remove_techs=crr-tech2", "--techs=crr-tech2", "example.tld");
@@ -295,9 +297,8 @@ public class UpdateDomainCommandTest extends EppToolCommandTestCase<UpdateDomain
 
   @Test
   public void testFailure_providedStatusesAndAddStatuses() throws Exception {
-    thrown.expect(
-        IllegalArgumentException.class,
-        "If you provide the statuses flag, "
+    thrown.expect(IllegalArgumentException.class);
+    thrown.expectMessage("If you provide the statuses flag, "
             + "you cannot use the add_statuses and remove_statuses flags.");
     runCommandForced(
         "--client=NewRegistrar",
@@ -308,9 +309,8 @@ public class UpdateDomainCommandTest extends EppToolCommandTestCase<UpdateDomain
 
   @Test
   public void testFailure_providedStatusesAndRemoveStatuses() throws Exception {
-    thrown.expect(
-        IllegalArgumentException.class,
-        "If you provide the statuses flag, "
+    thrown.expect(IllegalArgumentException.class);
+    thrown.expectMessage("If you provide the statuses flag, "
             + "you cannot use the add_statuses and remove_statuses flags.");
     runCommandForced(
         "--client=NewRegistrar",