Bumping gaia.json for 3 gaia revision(s) a=gaia-bump

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https://hg.mozilla.org/integration/gaia-central/rev/b37b9a24577f
Author: Michael Henretty <michael.henretty@gmail.com>
Desc: Merge pull request #17470 from 6a68/bug-986716-reenable-tests

Revert "Bug 986716 - Personatestuser.org is timing out"

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https://hg.mozilla.org/integration/gaia-central/rev/e5671a6d9065
Author: Jared Hirsch <ohai@6a68.net>
Desc: Revert "Bug 986716 - Personatestuser.org is timing out"

This reverts commit a970a22cceab5537dae680b9a172468602d901c7.

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https://hg.mozilla.org/integration/gaia-central/rev/3261e1873868
Author: Kevin Grandon <kevingrandon@yahoo.com>
Desc: Revert "Bug 982260 - Gaia-integration tests on TBPL fail with: TEST-UNEXPECTED-FAIL | Contacts > Details Merging 15 contacts"

This reverts commit 3ba3079118b95b84d12e0e0a8555d329da4fe4b9.
Bumping manifests a=b2g-bump