Fixes and improvements

* Allow zeroed cntRecordPeriod as special case (no counters dump)
  instead of throwing exception for invalid time measure.
* Remove symlink to services_example in st client deployment and
  improve help to guide to correct configuration of services.
* Alert about restarting ADML processes when dynamic library has
  been updated/selected.
* Fixed ApplicationMessageOamModule key (eventId now includes
  %s_%s instead of %s%s to avoid possible ambiguity in a key
  definition from to values.
* Hide exception for non Result-Code in diameter answer,
  because this AVP is optional even in some answers.
* Initialize resultCode to -1 instead of 0 to avoid having a
  ResultCode0 as counter prefixes.
* Remove warning from OriginHostManager::getOriginHost when
  item is not found, because this is used also to discard
  redefinitions when something already exists in the map.
* CodecEngine getter has been fixed to cover the monostack
  case where the stack id does not correspond to the app id
  in the requests but the value of 0 (normally).
* Clarify MessageDeque warnings when answer is analyzed
  during configured from original request: this seems to
  be missing warnings from request message findings but
  that are coming from answer !