Make maven artifact IDs unique.

Author: tswast

appengine/datastore/indexes-perfect/pom.xml

@@ -18,7 +18,7 @@ Copyright 2016 Google Inc. All Rights Reserved.
   <packaging>war</packaging>
   <version>1.0-SNAPSHOT</version>
   <groupId>com.example.appengine</groupId>
-  <artifactId>appengine-datastore-indexes-exploding</artifactId>
+  <artifactId>appengine-datastore-indexes-perfect</artifactId>
   <parent>
     <groupId>com.google.cloud</groupId>
     <artifactId>doc-samples</artifactId>

appengine/datastore/indexes/pom.xml

@@ -18,7 +18,7 @@ Copyright 2016 Google Inc. All Rights Reserved.
   <packaging>war</packaging>
   <version>1.0-SNAPSHOT</version>
   <groupId>com.example.appengine</groupId>
-  <artifactId>appengine-datastore</artifactId>
+  <artifactId>appengine-datastore-indexes</artifactId>
   <parent>
     <groupId>com.google.cloud</groupId>
     <artifactId>doc-samples</artifactId>