Refer to Datastore everywhere correctly by its capitalized form

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

java/google/registry/env/common/backend/WEB-INF/web.xml

@@ -113,19 +113,19 @@
     <url-pattern>/_dr/task/verifyEntityIntegrity</url-pattern>
   </servlet-mapping>
 
-  <!-- Exports a datastore backup snapshot to GCS. -->
+  <!-- Exports a Datastore backup snapshot to GCS. -->
   <servlet-mapping>
     <servlet-name>backend-servlet</servlet-name>
     <url-pattern>/_dr/task/exportSnapshot</url-pattern>
   </servlet-mapping>
 
-  <!-- Checks the completion of a datastore backup snapshot. -->
+  <!-- Checks the completion of a Datastore backup snapshot. -->
   <servlet-mapping>
     <servlet-name>backend-servlet</servlet-name>
     <url-pattern>/_dr/task/checkSnapshot</url-pattern>
   </servlet-mapping>
 
-  <!-- Loads a datastore backup snapshot into BigQuery. -->
+  <!-- Loads a Datastore backup snapshot into BigQuery. -->
   <servlet-mapping>
     <servlet-name>backend-servlet</servlet-name>
     <url-pattern>/_dr/task/loadSnapshot</url-pattern>
@@ -157,7 +157,7 @@
     <url-pattern>/_dr/cron/commitLogFanout</url-pattern>
   </servlet-mapping>
 
-  <!-- Deletes old commit logs from datastore. -->
+  <!-- Deletes old commit logs from Datastore. -->
   <servlet-mapping>
     <servlet-name>backend-servlet</servlet-name>
     <url-pattern>/_dr/task/deleteOldCommitLogs</url-pattern>

java/google/registry/env/common/default/WEB-INF/queue.xml

@@ -37,7 +37,7 @@
     <bucket-size>100</bucket-size>
     <retry-parameters>
       <!-- Retry aggressively since a single delayed export increases our time window of
-           unrecoverable data loss in the event of a datastore failure. -->
+           unrecoverable data loss in the event of a Datastore failure. -->
       <min-backoff-seconds>1</min-backoff-seconds>
       <max-backoff-seconds>60</max-backoff-seconds>
       <!-- No age limit; a failed export should be retried as long as possible to avoid

java/google/registry/env/common/tools/WEB-INF/web.xml

@@ -48,7 +48,7 @@
     <url-pattern>/_dr/loadtest</url-pattern>
   </servlet-mapping>
 
-  <!-- Command line tool uses this endpoint to modify the datastore. -->
+  <!-- The nomulus command line tool uses this endpoint to write to Datastore. -->
   <servlet>
     <display-name>Remote API Servlet</display-name>
     <servlet-name>RemoteApiServlet</servlet-name>