reorder imports alphabetically
create user_voicemail service
add user_voicemail association validator
add voicemail_user dao method needed for validation
Fix import in user_voicemail model
implement user_voicemail dao:associate
update user_voicemail find_all_by_user_id to get_by_user_id
reorder imports alphabetically
create user_voicemail service
add user_voicemail association validator
add voicemail_user dao method needed for validation
Fix import in user_voicemail model
implement user_voicemail dao:associate
fix bugs in unittests on user_voicemail validator
link user_voicemail with SIP and SCCP lines
implement notifier for sending sysconf commands
add 'enabled' parameter to user_voicemail
refactor tests, make the more readable
associate a voicemail only to the main user
send even in bus on user voicemail association