MAP / CAP operation logging

[vetss]

We need to implement separate logging for a list of sent / received MAP / CAP messages. The solution may be - any MAP / CAP error message, error / abort message will be logged into a single class log (DEBUG LEVEL) that later can be by using of different appender route this logging into a separate log file (we need to provide a separate example for it).

Each log record must contain one line with stricted fields structure for uniform (like we do for CDR).

here is the original request: "Is it possible to have an additional log to show the ss7 requests we made to peer? This log should have each line indicate whether it's a SRI or Mt-ForwardSM, whether it's success or failure, an ID to correlate to message id in cdr log, etc. We raise this request because one of our peers charge us based on the MSU usage. The implementation must also factor in latest features like SRI-drop and SRI response cache."