KAZOO-2213

sup commands for "call_restriction" flags management 

Set call_restriction flag on account level
Usage: sup callflow_maintenance account_set_classifier_allow international accountname
       sup callflow_maintenance account_set_classifier_deny international accountname
       sup callflow_maintenance all_accounts_set_classifier_allow international
       sup callflow_maintenance all_accounts_set_classifier_deny international


Set call_restriction flag on device level
Usage: sup callflow_maintenance device_classifier_allow international  username@realm.tld
       sup callflow_maintenance device_classifier_inherit international  username@realm.tld
       sup callflow_maintenance device_classifier_deny international username@realm.tld