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

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https://hg.mozilla.org/integration/gaia-2_0/rev/5592cba8b273
Author: Viorela Ioia <viorelaioia@gmail.com>
Desc: Bug 1028192 - Disable ActiveSync tests

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https://hg.mozilla.org/integration/gaia-2_0/rev/12604b8fc4a0
Author: Kevin Grandon <kevingrandon@yahoo.com>
Desc: Merge pull request #21080 from KevinGrandon/bug_1030713_search_subdomain_dedupe

Bug 1030713 - [Collection app] Web results get wrongfully deduped

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https://hg.mozilla.org/integration/gaia-2_0/rev/ac8a7711f2d6
Author: Kevin Grandon <kevingrandon@yahoo.com>
Desc: Merge pull request #21068 from KevinGrandon/bug_1030704_collection_divider

Bug 1030704 - [Collection app] Divider under pinned apps hidden

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https://hg.mozilla.org/integration/gaia-2_0/rev/686a59bb31d9
Author: Jose M. Cantera <jmcanterafonseca@gmail.com>
Desc: Merge pull request #20801 from jmcanterafonseca/fix_sim_dups_another

Bug 1028106 - Invalid information of automated merged contacts and conta...

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https://hg.mozilla.org/integration/gaia-2_0/rev/4023f0807872
Author: Jose M. Cantera <jmcanterafonseca@gmail.com>
Desc: Merge pull request #20605 from jmcanterafonseca/fix_sim_dups_final

Bug 1026369 - In import, contacts are duplicated.
Bumping manifests a=b2g-bump