use_syslog option fixed

[bungeethefrog]

Use_syslog option was not working due to typo in template conf file (misspelled variable name) and fact that default value for log_file was set in data/common.yaml and therefore condition on line 46 in manifest/config.pp could never be satisfied with use_syslog set to true.

Alteration made:

• template conf file:
  • variable name fixed
  • altered logic to set default log file value as needed, based on log_file and use_syslog variables
• data/common.yaml file:
  • set null as default value for both log_file and use_syslog variables
• manifest/config.pp and manifest/init.pp files:
  • set use_syslog variable as optional, since it does not have to be set always and in template conf file both 'null' and 'false' are handled as they should be
  • insignificant typo fix in manifest/config.pp