Rename user_spec to notifiable_spec
Update method names on notifiers

notify_once to send_public_notifications
rename notify_once to send_notification for notifiable
Update calls to notifiers on batch objects
Add apns_spec
spec_helper sets up grocer
Make APNS testable
Public batch is now testable
Add grocer feedback setup to fwt_push_notification_server
Merge branch 'refs/heads/test_grocer' into dev
Set minimum test coverage to 80%
Merge branch 'refs/heads/update_minimum_test_coverage' into dev