Add the App Engine service used in the Action definition

Our goal is to be able to address every Action by looking at the class itself, and to make it clearer at a glance what you need to access the Action's endpoint

Currently, we can know from the @Action annotation:
- the endpoint path
- the Method needed
- the authentication level needed

This CL adds the service where the Action is hosted, which also translates to the URL.

NOTE - currently we don't have any Action hosted on multiple services. I don't think we will ever need it (since they do the same thing no matter which service they are on, so why host it twice?), but if we do we'll have to update the code to allow it.

The next step after this is to make sure all the @Parameters are defined on the Action itself, and then we will be able to craft access to the endpoint programatically (or at least verify at run-time we crafted a correct URL)

-------------
Created by MOE: https://github.com/google/moe
MOE_MIGRATED_REVID=229375735

java/google/registry/batch/DeleteContactsAndHostsAction.java

@@ -107,7 +107,10 @@ import org.joda.time.Duration;
  * A mapreduce that processes batch asynchronous deletions of contact and host resources by mapping
  * over all domains and checking for any references to the contacts/hosts in pending deletion.
  */
-@Action(path = "/_dr/task/deleteContactsAndHosts", auth = Auth.AUTH_INTERNAL_ONLY)
+@Action(
+    service = Action.Service.BACKEND,
+    path = "/_dr/task/deleteContactsAndHosts",
+    auth = Auth.AUTH_INTERNAL_ONLY)
 public class DeleteContactsAndHostsAction implements Runnable {
 
   static final String KIND_CONTACT = getKind(ContactResource.class);

java/google/registry/batch/DeleteLoadTestDataAction.java

@@ -44,13 +44,17 @@ import javax.inject.Inject;
  * Hard deletes load-test ContactResources, HostResources, their subordinate history entries, and
  * the associated ForeignKey and EppResourceIndex entities.
  *
- * <p>This only deletes contacts and hosts, NOT domains. To delete domains, use
- * {@link DeleteLoadTestDataAction} and pass it the TLD(s) that the load test domains were created
- * on. Note that DeleteLoadTestDataAction is safe enough to run in production whereas this mapreduce
- * is not, but this one does not need to be runnable in production because load testing isn't run
- * against production.
+ * <p>This only deletes contacts and hosts, NOT domains. To delete domains, use {@link
+ * DeleteLoadTestDataAction} and pass it the TLD(s) that the load test domains were created on. Note
+ * that DeleteLoadTestDataAction is safe enough to run in production whereas this mapreduce is not,
+ * but this one does not need to be runnable in production because load testing isn't run against
+ * production.
  */
-@Action(path = "/_dr/task/deleteLoadTestData", method = POST, auth = Auth.AUTH_INTERNAL_ONLY)
+@Action(
+    service = Action.Service.BACKEND,
+    path = "/_dr/task/deleteLoadTestData",
+    method = POST,
+    auth = Auth.AUTH_INTERNAL_ONLY)
 public class DeleteLoadTestDataAction implements Runnable {
 
   private static final FluentLogger logger = FluentLogger.forEnclosingClass();

java/google/registry/batch/DeleteProberDataAction.java

@@ -64,10 +64,10 @@ import org.joda.time.Duration;
  * <p>See: https://www.youtube.com/watch?v=xuuv0syoHnM
  */
 @Action(
-  path = "/_dr/task/deleteProberData",
-  method = POST,
-  auth = Auth.AUTH_INTERNAL_ONLY
-)
+    service = Action.Service.BACKEND,
+    path = "/_dr/task/deleteProberData",
+    method = POST,
+    auth = Auth.AUTH_INTERNAL_ONLY)
 public class DeleteProberDataAction implements Runnable {
 
   private static final FluentLogger logger = FluentLogger.forEnclosingClass();

java/google/registry/batch/ExpandRecurringBillingEventsAction.java

@@ -67,15 +67,14 @@ import org.joda.time.DateTime;
 /**
  * A mapreduce that expands {@link Recurring} billing events into synthetic {@link OneTime} events.
  *
- * <p>The cursor used throughout this mapreduce (overridden if necessary using the parameter
- * {@code cursorTime}) represents the inclusive lower bound on the range of billing times that will
- * be expanded as a result of the job (the exclusive upper bound being the execution time of the
- * job).
+ * <p>The cursor used throughout this mapreduce (overridden if necessary using the parameter {@code
+ * cursorTime}) represents the inclusive lower bound on the range of billing times that will be
+ * expanded as a result of the job (the exclusive upper bound being the execution time of the job).
  */
 @Action(
-  path = "/_dr/task/expandRecurringBillingEvents",
-  auth = Auth.AUTH_INTERNAL_ONLY
-)
+    service = Action.Service.BACKEND,
+    path = "/_dr/task/expandRecurringBillingEvents",
+    auth = Auth.AUTH_INTERNAL_ONLY)
 public class ExpandRecurringBillingEventsAction implements Runnable {
 
   public static final String PARAM_CURSOR_TIME = "cursorTime";

java/google/registry/batch/RefreshDnsOnHostRenameAction.java

@@ -73,9 +73,9 @@ import org.joda.time.Duration;
 
 /** Performs batched DNS refreshes for applicable domains following a host rename. */
 @Action(
-  path = "/_dr/task/refreshDnsOnHostRename",
-  auth = Auth.AUTH_INTERNAL_ONLY
-)
+    service = Action.Service.BACKEND,
+    path = "/_dr/task/refreshDnsOnHostRename",
+    auth = Auth.AUTH_INTERNAL_ONLY)
 public class RefreshDnsOnHostRenameAction implements Runnable {
 
   private static final FluentLogger logger = FluentLogger.forEnclosingClass();

java/google/registry/batch/ResaveAllEppResourcesAction.java

@@ -40,9 +40,9 @@ import javax.inject.Inject;
  * which only admin users can do.
  */
 @Action(
-  path = "/_dr/task/resaveAllEppResources",
-  auth = Auth.AUTH_INTERNAL_OR_ADMIN
-)
+    service = Action.Service.BACKEND,
+    path = "/_dr/task/resaveAllEppResources",
+    auth = Auth.AUTH_INTERNAL_OR_ADMIN)
 public class ResaveAllEppResourcesAction implements Runnable {
 
   @Inject MapreduceRunner mrRunner;

java/google/registry/batch/ResaveEntityAction.java

@@ -38,7 +38,11 @@ import org.joda.time.DateTime;
  *
  * <p>{@link EppResource}s will be projected forward to the current time.
  */
-@Action(path = ResaveEntityAction.PATH, auth = Auth.AUTH_INTERNAL_OR_ADMIN, method = Method.POST)
+@Action(
+    service = Action.Service.BACKEND,
+    path = ResaveEntityAction.PATH,
+    auth = Auth.AUTH_INTERNAL_OR_ADMIN,
+    method = Method.POST)
 public class ResaveEntityAction implements Runnable {
 
   public static final String PATH = "/_dr/task/resaveEntity";