Bug 847269 - [Statusbar] icons.notification is visible during power off

1. Title : [Statusbar] icons.notification is visible during power off
2. Precondition : Have at least one notification on statusbar.
3. Tester's Action : Press the Power key to turn off.
4. Detailed Symptom (ENG.) : The notification icon at top-left appears during power off. 
5. Expected : Everything must be removed from screen during power off.
6.Reproducibility: Y
1)Frequency Rate : 100%
7.Gaia Revision: a03f7b532e9998e646d55f93a0fc03a04d7ca7d9