bug 843409: uplift mozharness unittests to mozilla-release when firefox 22 merges in. r=bhearsum

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extra : source : 8f018ce6f5253ff7585e0859b92f6d3595e4ecd7
bug 855018: uplift alive test death to release when firefox 22 merges in. r=bhearsum

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extra : source : 3ea5118d4d560a25e7e7375b83e654588427ad4b
bug 877336: Stop running mozilla-beta jobs for Fed, Fed64, WinXP and Win7 (rev3 machines). r=bhearsum

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extra : source : a8f61cc936af6338882b45b1f5ea1ece68ccb3f2