Prefer re2 over java.util.regex

Java's stock regex implementation doesn't guarantee linear time
complexity which makes it a security liability.
-------------
Created by MOE: https://github.com/google/moe
MOE_MIGRATED_REVID=121159875

javatests/google/registry/flows/BUILD

@@ -37,6 +37,7 @@ java_library(
         "//third_party/java/junit",
         "//third_party/java/mockito",
         "//third_party/java/objectify:objectify-v4_1",
+        "//third_party/java/re2j",
         "//third_party/java/servlet/servlet_api",
         "//third_party/java/truth",
         "//java/google/registry/config",

javatests/google/registry/flows/EppTlsServletTest.java

@@ -19,6 +19,8 @@ import static java.nio.charset.StandardCharsets.UTF_8;
 import static org.mockito.Mockito.when;
 
 import com.google.common.collect.ImmutableMap;
+import com.google.re2j.Matcher;
+import com.google.re2j.Pattern;
 
 import google.registry.model.registrar.Registrar;
 import google.registry.testing.AppEngineRule;
@@ -31,9 +33,6 @@ import org.junit.Test;
 import org.junit.runner.RunWith;
 import org.mockito.runners.MockitoJUnitRunner;
 
-import java.util.regex.Matcher;
-import java.util.regex.Pattern;
-
 /** Test setup for EppServletTest subclasses. */
 @RunWith(MockitoJUnitRunner.class)
 public class EppTlsServletTest extends EppServletXmlLoginTestCase<EppTlsServlet> {

javatests/google/registry/tools/BUILD

@@ -32,6 +32,7 @@ java_library(
         "//third_party/java/junit",
         "//third_party/java/mockito",
         "//third_party/java/objectify:objectify-v4_1",
+        "//third_party/java/re2j",
         "//third_party/java/truth",
         "//java/google/registry/config",
         "//java/google/registry/flows",

javatests/google/registry/tools/CommandTestCase.java

@@ -44,7 +44,6 @@ import java.io.File;
 import java.io.IOException;
 import java.io.PrintStream;
 import java.util.List;
-import java.util.regex.Pattern;
 
 /**
  * Base class for all command tests.
@@ -154,10 +153,6 @@ public abstract class CommandTestCase<C extends Command> {
     assertThat(stdout.toString(UTF_8.toString())).contains(expected);
   }
 
-  void assertInStdout(Pattern expected) throws Exception {
-    assertThat(stdout.toString(UTF_8.toString())).containsMatch(expected);
-  }
-
   void assertNotInStdout(String expected) throws Exception {
     assertThat(stdout.toString(UTF_8.toString())).doesNotContain(expected);
   }

javatests/google/registry/tools/server/BUILD

@@ -23,6 +23,7 @@ java_library(
         "//third_party/java/junit",
         "//third_party/java/mockito",
         "//third_party/java/objectify:objectify-v4_1",
+        "//third_party/java/re2j",
         "//third_party/java/servlet/servlet_api",
         "//third_party/java/truth",
         "//java/google/registry/groups",

javatests/google/registry/ui/forms/BUILD

@@ -18,6 +18,7 @@ java_library(
         "//third_party/java/hamcrest",
         "//third_party/java/junit",
         "//third_party/java/mockito",
+        "//third_party/java/re2j",
         "//third_party/java/truth",
         "//java/google/registry/ui/forms",
     ],

javatests/google/registry/ui/forms/FormFieldTest.java

@@ -30,6 +30,7 @@ import com.google.common.collect.ImmutableSet;
 import com.google.common.collect.Lists;
 import com.google.common.collect.Range;
 import com.google.common.testing.NullPointerTester;
+import com.google.re2j.Pattern;
 
 import org.junit.Rule;
 import org.junit.Test;
@@ -40,7 +41,6 @@ import org.junit.runners.JUnit4;
 import java.util.List;
 import java.util.Map;
 import java.util.Set;
-import java.util.regex.Pattern;
 
 /** Unit tests for {@link FormField}. */
 @RunWith(JUnit4.class)

javatests/google/registry/util/BUILD

@@ -23,6 +23,7 @@ java_library(
         "//third_party/java/jsr305_annotations",
         "//third_party/java/junit",
         "//third_party/java/mockito",
+        "//third_party/java/re2j",
         "//third_party/java/truth",
         "//java/google/registry/util",
         "//javatests/google/registry/testing",

javatests/google/registry/xjc/BUILD

@@ -16,6 +16,7 @@ java_library(
         "//third_party/java/hamcrest",
         "//third_party/java/jsr305_annotations",
         "//third_party/java/junit",
+        "//third_party/java/re2j",
         "//third_party/java/truth",
         "//java/google/registry/util",
         "//java/google/registry/xjc",

javatests/google/registry/xjc/XjcObjectTest.java

@@ -21,6 +21,8 @@ import static google.registry.xjc.XjcXmlTransformer.unmarshal;
 import static java.nio.charset.StandardCharsets.UTF_16;
 import static java.nio.charset.StandardCharsets.UTF_8;
 
+import com.google.re2j.Pattern;
+
 import google.registry.testing.ExceptionRule;
 import google.registry.xjc.rde.XjcRdeDeposit;
 import google.registry.xjc.rde.XjcRdeDepositTypeType;
@@ -33,7 +35,6 @@ import org.junit.runners.JUnit4;
 
 import java.io.ByteArrayInputStream;
 import java.io.ByteArrayOutputStream;
-import java.util.regex.Pattern;
 
 /** Unit tests for {@code XjcObject}. */
 @RunWith(JUnit4.class)