fix: make script running with -e option

bash -e means stop on errors which is safer
so the tests had to be reversed to use OR vs AND operations

Signed-off-by: Philippe Coval <rzr@gna.org>
Merge pull request #303 from rzr/master

fix: make script running with -e option
Refactoring AdbHelper
Merge pull request #312 from askeing/modify_adb

Refactoring AdbHelper
Add python version backup_restore_profile.py
Merge pull request #313 from askeing/backup_restore

Add python version backup_restore_profile.py
fix osx frontground issue
Adding b2g34 channel
Merge pull request #316 from echangmoz/Add_b2g34_channel

Adding b2g34 channel to change_channel.sh
Merge pull request #315 from zapion/fix_osx_frontground

fix osx frontground issue