Bumping gaia.json for 8 gaia-central revision(s) a=gaia-bump

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https://hg.mozilla.org/integration/gaia-central/rev/22baa8dbea5c
Author: Andrew Sutherland <asutherland@asutherland.org>
Desc: Merge pull request #13893 from asutherland/fix-mail-drafts-test

Bug 938649 - [email] Intermittent Travis Marionette JS Failure: go to local drafts page should show correct name in a item of mail list: NoSuchElement: (7) Unable to locate element: .card-compose .cmp-back-btn. r=lightsofapollo

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https://hg.mozilla.org/integration/gaia-central/rev/c0398743705a
Author: Andrew Sutherland <asutherland@asutherland.org>
Desc: Bug 938649 - [email] Intermittent Travis Marionette JS Failure: go to local drafts page should show correct name in a item of mail list: NoSuchElement: (7) Unable to locate element: .card-compose .cmp-back-btn. r=lightsofapollo

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https://hg.mozilla.org/integration/gaia-central/rev/377953f592ad
Author: Salvador de la Puente González <salva@unoyunodiez.com>
Desc: Merge pull request #13708 from gitmai/bug-937240-remove-mindgap

Bug 937240 - [COST CONTROL] Remove the  module mindgap and filtering operations ...
r=salva

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https://hg.mozilla.org/integration/gaia-central/rev/6389f81d9ab9
Author: mai <mri@tid.es>
Desc: Bug 937240 - [COST CONTROL] Remove the  module mindgap and filtering operations of historical data

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https://hg.mozilla.org/integration/gaia-central/rev/9ca3d79527c7
Author: Casey Yee <cyee@mozilla.com>
Desc: Merge pull request #13403 from caseyyee/bug-934970

Bug 934970:  [Email] Update Drawer Visual Design

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https://hg.mozilla.org/integration/gaia-central/rev/63cceb035784
Author: Casey Yee <casey@caseyyee.com>
Desc: Bug 934970: [Email] Update Drawer Visual Design

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https://hg.mozilla.org/integration/gaia-central/rev/a9f6fcb28bb6
Author: Casey Yee <cyee@mozilla.com>
Desc: Merge pull request #13405 from caseyyee/bug-934977

Bug 934977:  [Calendar] Update Drawer Visual Design

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https://hg.mozilla.org/integration/gaia-central/rev/482957031e53
Author: Casey Yee <casey@caseyyee.com>
Desc: Bug 934977: [Calendar] Update Drawer Visual Design