Bumping gaia.json for 5 gaia-central revision(s) a=gaia-bump

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https://hg.mozilla.org/integration/gaia-central/rev/1e5d4d5346c7
Author: Trif Andrei-Alin <trifandreialin@gmail.com>
Desc: Merge pull request #12976 from viorelaioia/bug_927131

Bug 927131 - Add an automated test to verify that you can import contacts from Gmail

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https://hg.mozilla.org/integration/gaia-central/rev/6aad2e2719fa
Author: Viorela Ioia <viorelaioia@gmail.com>
Desc: Bug 927131 - Add an automated test to verify that you can import contacts from Gmail

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https://hg.mozilla.org/integration/gaia-central/rev/0b4541c4a3df
Author: Zac <zcampbell@mozilla.com>
Desc: Merge pull request #13294 from bebef1987/UI-tests

Bug 927870 - Neaten up UI Tests app's app object

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https://hg.mozilla.org/integration/gaia-central/rev/eca8e33717fc
Author: Bebe <bebe@mozilla.ro>
Desc: Bug 927870 - Neaten up UI Tests app's app object

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https://hg.mozilla.org/integration/gaia-central/rev/366b1aa665ca
Author: Ben Kelly <ben@wanderview.com>
Desc: Bug 924565 - Use Applications.installedApps in gaiatest. r=dhunt

b2g/config/gaia.json

@@ -1,4 +1,4 @@
 {
-    "revision": "11436e5bd29bff4383dfdc89a2ca1028c905f1bc", 
+    "revision": "1e5d4d5346c7c79821a77a63b0a22db642f32795", 
     "repo_path": "/integration/gaia-central"
 }