Fix small errors in the logs sub-module: - erroneous logs - check if configured logs collection exist to confirm correct connection
Fix small errors in the logs sub-module:
- erroneous logs
- check if configured logs collection exist to confirm correct connection

shinken-monitoring/mod-webui,mohierf/mod-webui,shinken-monitoring/mod-webui,mohierf/mod-webui,mohierf/mod-webui,shinken-monitoring/mod-webui