add func_key_dest_agent table
move func key unit test helpers into seperate class
write DAO for fetching all hints
remove old asterisk_conf_dao code for hints

will be replaced by new hint_dao and hint generator in confgen
fix pep8 warnings
fix bug in context name
fix bug in agent actions
ignore users that don't have enablehint on
Merge branch '5279_func_key_agent'