Merge pull request #10304 from jedp/get-rp-tests

Bug 881435 - UI Tests for navigator.mozId.get(); r=ferjm

(cherry picked from commit 278d090ceada5ac7ab0519116cd23a3f2be42267)

Conflicts:
	test_apps/uitest/index.html
Merge pull request #10585 from jedp/get-rp-tests-v1-train

Bug 881435 - UI Tests for navigator.mozId.get(); r=ferjm