Bumping gaia.json for 1 gaia-1_2 revision(s) a=NPOTB

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https://hg.mozilla.org/integration/gaia-1_2/rev/ecea8fce5cc6
Author: Ghislain 'Aus' Lacroix <aus@noiseport.org>
Desc: Merge pull request #12323 from nullaus/891724-supportcontactcustomization

bug 891724
Bug 918107 followup: disable tests that don't like the temporary hack, a=bustage

--HG--
extra : rebase_source : 0f30457480b7c7e9b50caffaa3e4c02761710a1d