Bumping gaia.json for 4 gaia revision(s) a=gaia-bump

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https://hg.mozilla.org/integration/gaia-central/rev/05d2bfd2b317
Author: James Lal <james@lightsofapollo.com>
Desc: Merge pull request #20941 from KevinGrandon/bug_1029766_collection_intermittent_test

Bug 1029766 - Scroll to collection element before tapping on it

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https://hg.mozilla.org/integration/gaia-central/rev/ef9e3bc5a7f7
Author: Kevin Grandon <kevingrandon@yahoo.com>
Desc: Bug 1029766 - Scroll to collection element before tapping on it

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https://hg.mozilla.org/integration/gaia-central/rev/7871381e4a63
Author: Sam Foster <sam@sam-i-am.com>
Desc: Merge pull request #20501 from sfoster/bug-1023179-tutorial-tests

Bug 1023179  - Fix FTU video unloading/loading, refactor tutorial initialization. r=fcampo

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https://hg.mozilla.org/integration/gaia-central/rev/c748b45e429d
Author: Sam Foster <sfoster@mozilla.com>
Desc: Bug 1023179 - Unload video properly, refactor Tutorial init sequence. r=fcampo

* Fix sporadic unencoding error by unloading video before loading new src.
* Refactor Tutorial init to eliminate race-conditions and better manage mixed sequence of asnyc and sync steps
* Use mock XHR for all tutorial tests
* Catch emptied/abort event when unloading video before assigning new src
* Use canplay event to signal video media loadedSignal media loaded
Bumping manifests a=b2g-bump