Bug 918727 - Update locator for video tests. r=zcampbell r=fstrugariu

Conflicts:
	tests/python/gaia-ui-tests/gaiatest/apps/videoplayer/app.py
Merge pull request #13308 from bobsilverberg/cp918727

Bug 934139 - [v1.2] Update videoplayer app and tests to be in line with master