Bug 922378 - [Messages] Some tests for SMS are failing locally r=rwaldron a=tests

(cherry picked from commit 5de99819ca192295a8179ddd345de6cf7ebb2287)
Bug 924214 - [Messages] Some test files can't be run in standalone mode r=rwaldron a=tests

(cherry picked from commit cae1767c908f239236fa9f63b8206fc6b463338f)
Bug 934491 - Test failure in 1.2 only - ringtonePlayer.removeAttribute is not a function r=me a=tests