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

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https://hg.mozilla.org/integration/gaia-central/rev/93cee70be62a
Author: Zac <zcampbell@mozilla.com>
Desc: Revert "Bug 1002342 - Update test_setup_and_send_imap_email.py to check for incoming notification"

This reverts commit f9bae4e2b852ac1e7a9d7a0f8d7e2624238575e9.

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https://hg.mozilla.org/integration/gaia-central/rev/bec4ead124de
Author: Florin Strugariu <bebef_1987@yahoo.com>
Desc: Merge pull request #18726 from askeing/bug_1002342

Bug 1002342 - Update test_setup_and_send_imap_email.py to check for inco...

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https://hg.mozilla.org/integration/gaia-central/rev/cf7390d66666
Author: askeing <askeing@gmail.com>
Desc: Bug 1002342 - Update test_setup_and_send_imap_email.py to check for incoming notification
Bumping manifests a=b2g-bump