opensips: starting to get rid of `macros`
opensips: initial code for notify_on_registrant_failure
opensips: removed macro processing
opensips: do not generate empty statements.
amqp: work around default change in amqp module

Apparently at some point the Node.js amqp module went from autoDelete defaulting to false, to defaulting to true.
opensips: removed `accounting` module
match current nodejs version
Remove X-CCNQ3-Number-Domain when sending to upstream.
opensips: Add statistics module (for upcoming user stats).