[behavior][XWALK-1565]Add powerfailure testcase for behavior

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Impacted TCs num(designed): New 1, update 0, deleted 0
Unit test platform: [tizen]
Merge pull request #835 from linshen/wrt/shenlin/movetctbehaviorpowerfailure

[behavior][XWALK-1565]Add powerfailure testcase for behavior