Bumping gaia.json for 1 gaia revision(s) a=gaia-bump

========

https://hg.mozilla.org/integration/gaia-central/rev/b7e1a02be1b6
Author: Ryan VanderMeulen <rvandermeulen@mozilla.com>
Desc: Revert "Merge pull request #19770 from tauzen/Bug1017572"

This reverts commit e794eeb8dcb308cd7b1580717ef38e2880987634, reversing
changes made to f6b5f77d47d103c672be388082f04709ccdf7f08.

b2g/config/gaia.json

@@ -4,6 +4,6 @@
         "remote": "", 
         "branch": ""
     }, 
-    "revision": "1fd3f3b1bf978f391b879a6bb0095ff37d9095d7", 
+    "revision": "b7e1a02be1b66c3bdeaf49ef9e80d2240d89e0c9", 
     "repo_path": "/integration/gaia-central"
 }