Merge pull request #582 from edx/thallada/update-bower

AN-8109 Upgrade bower to 1.7.2

package.json

@@ -5,7 +5,7 @@
     "url": "git://github.com/edx/edx-analytics-dashboard"
   },
   "dependencies": {
-    "bower": "^1.3.12",
+    "bower": "1.7.2",
     "cldr-data-downloader": "0.2.5",
     "requirejs": "^2.1.14"
   },