Bumping gaia.json for 6 gaia-1_2 revision(s) a=gaia-bump

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https://hg.mozilla.org/integration/gaia-1_2/rev/5898ab61dbfa
Author: Bob Silverberg <bob.silverberg@gmail.com>
Desc: Merge pull request #14098 from bobsilverberg/8a27477d

Bug 941582 - Python wait for save progress bar to clear when deleting/editing photos

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https://hg.mozilla.org/integration/gaia-1_2/rev/03dbafc2cdf5
Author: Zac Campbell <zcampbell@mozilla.com>
Desc: Bug 941582 - Python wait for save progress bar to clear when deleting/editing photos

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https://hg.mozilla.org/integration/gaia-1_2/rev/0b63e65a2e0c
Author: Bob Silverberg <bob.silverberg@gmail.com>
Desc: Merge pull request #14095 from bobsilverberg/0929e242

Bug 935052 - Python Remove launch() methods from homescreen tests

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https://hg.mozilla.org/integration/gaia-1_2/rev/f06d78fff32b
Author: Zac Campbell <zcampbell@mozilla.com>
Desc: Bug 935052 - Python Remove launch() methods from homescreen tests

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https://hg.mozilla.org/integration/gaia-1_2/rev/05056f805c51
Author: Bob Silverberg <bob.silverberg@gmail.com>
Desc: Merge pull request #14094 from bobsilverberg/cp394afb37

Bug 935052 - Remove launch method from Camera app object

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https://hg.mozilla.org/integration/gaia-1_2/rev/b0d3982a8718
Author: Zac Campbell <zcampbell@mozilla.com>
Desc: Bug 935052 - Remove launch method from Camera app object