Refer to Datastore everywhere correctly by its capitalized form

-------------
Created by MOE: https://github.com/google/moe
MOE_MIGRATED_REVID=147479683

java/google/registry/tools/server/DeleteEntityAction.java

@@ -78,7 +78,7 @@ public class DeleteEntityAction implements Runnable {
         rawDeletionsBuilder.add(rawEntity.get().getKey());
         continue;
       }
-      // The entity could not be found by either Objectify or the datastore service
+      // The entity could not be found by either Objectify or the Datastore service
       throw new BadRequestException("Could not find entity with key " + rawKeyString);
     }
     // Delete raw entities.
@@ -108,7 +108,7 @@ public class DeleteEntityAction implements Runnable {
     try {
       return Optional.fromNullable(getDatastoreService().get(rawKey));
     } catch (EntityNotFoundException e) {
-      logger.warningfmt(e, "Could not load entity from datastore service with key %s",
+      logger.warningfmt(e, "Could not load entity from Datastore service with key %s",
           rawKey.toString());
       return Optional.absent();
     }

java/google/registry/tools/server/KillAllCommitLogsAction.java

@@ -35,7 +35,7 @@ import google.registry.request.Response;
 import java.util.Arrays;
 import javax.inject.Inject;
 
-/** Deletes all commit logs in datastore. */
+/** Deletes all commit logs in Datastore. */
 @Action(path = "/_dr/task/killAllCommitLogs", method = POST)
 public class KillAllCommitLogsAction implements Runnable {
 

java/google/registry/tools/server/KillAllEppResourcesAction.java

@@ -35,7 +35,7 @@ import google.registry.request.Action;
 import google.registry.request.Response;
 import javax.inject.Inject;
 
-/** Deletes all {@link EppResource} objects in datastore, including indices and descendants. */
+/** Deletes all {@link EppResource} objects in Datastore, including indices and descendants. */
 @Action(path = "/_dr/task/killAllEppResources", method = POST)
 public class KillAllEppResourcesAction implements Runnable {