KAZOO-557: move couch publisher into list comprehension
KAZOO-557: track call-id to cdr url mappings in listener
KAZOO-557: update formatting
KAZOO-557: check the cdr urls dict for callid of cdr
KAZOO-557: update logging of sending CDR to remote server
KAZOO-557: unbind from cdr binding if we receive a cdr, whether we have a url or not