heartbeat/syslog-ng-pe-7: added resource file for Syslog-ng Premium Edition 7

• added resource file for syslog-ng PE 7
• based on the syslog-ng OSE resource file
• modifications include
• added resource parameters
  • control_file
  • persist_file
  • pidfile
• parameters have defaults of the default Syslog-ng PE 7 install
• these have to be changed if shared disk is used
• added a more gentle stop method to the stop command
  • will fall back to the original method if any of the preconditions are missing

Signed-off-by: Janos SZIGETVARI <jszigetvari@gmail.com>