syslog_ng: add syslog-ng state and execution modules
syslog_ng: add docstrings and examples
syslog_ng: remove unused pdb import
syslog_ng: use default False value when checking for __opts__['test']
syslog_ng: fix pep8 lint errors and warnings
Merge pull request #15392 from ihrwein/f/add-syslog-ng-modules

F/add syslog ng modules