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

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https://hg.mozilla.org/integration/gaia-2_0/rev/703c3dfe2d8f
Author: Dale Harvey <dale@arandomurl.com>
Desc: Bug 1025854 - Remove invalid test. r=kgrandon
Bumping manifests a=b2g-bump