Move moment inclusion from gr-date to gr-app

This allows for moment to only be included in standalone.

Change-Id: I35305e73e3ec6882f3a8ad3f40a3940bbe9a8bc2
diff --git a/polygerrit-ui/app/elements/gr-app.html b/polygerrit-ui/app/elements/gr-app.html
index 533136c..0301a13 100644
--- a/polygerrit-ui/app/elements/gr-app.html
+++ b/polygerrit-ui/app/elements/gr-app.html
@@ -42,6 +42,7 @@
     safeTypesBridge: Gerrit.SafeTypes.safeTypesBridge,
   });
 </script>
+<script src="../bower_components/moment/moment.js"></script>
 
 <link rel="import" href="../behaviors/base-url-behavior/base-url-behavior.html">
 <link rel="import" href="../behaviors/keyboard-shortcut-behavior/keyboard-shortcut-behavior.html">
diff --git a/polygerrit-ui/app/elements/shared/gr-date-formatter/gr-date-formatter.html b/polygerrit-ui/app/elements/shared/gr-date-formatter/gr-date-formatter.html
index 1090fea..481dd2f 100644
--- a/polygerrit-ui/app/elements/shared/gr-date-formatter/gr-date-formatter.html
+++ b/polygerrit-ui/app/elements/shared/gr-date-formatter/gr-date-formatter.html
@@ -20,7 +20,6 @@
 <link rel="import" href="../gr-rest-api-interface/gr-rest-api-interface.html">
 <link rel="import" href="../../../styles/shared-styles.html">
 
-<script src="../../../bower_components/moment/moment.js"></script>
 <script src="../../../scripts/util.js"></script>
 
 <dom-module id="gr-date-formatter">
diff --git a/polygerrit-ui/app/test/common-test-setup.html b/polygerrit-ui/app/test/common-test-setup.html
index 92b99e3..c5979fa 100644
--- a/polygerrit-ui/app/test/common-test-setup.html
+++ b/polygerrit-ui/app/test/common-test-setup.html
@@ -60,3 +60,4 @@
 <link rel="import"
     href="../bower_components/iron-test-helpers/iron-test-helpers.html" />
 <link rel="import" href="test-router.html" />
+<script src="../bower_components/moment/moment.js"></script>