Add support for RFC monitoring

The sapbasis_agentil probe is able to monitor RFC destinations of a SAP
system. This is done by customizing the appropiate job (id=602).

This customization can now be done through the agentil_template resource
with a new property rfc_destinations. Right now every RFC destination is
configured the same way (strict=RFC destination has to work on all
application servers, check_mode=2 automatic authentication check if
appropiate for the type of rfc connection, alarm and qos is enabled,
etc)
Merge branch 'sap_rfc_connection'

* sap_rfc_connection:
  Add support for RFC monitoring