Merge pull request #1291 from dooblem/master

Fix: #1289 discovering linux hosts with recent nmap versions
Add RELOAD-CONFIG external command

The module ws-arbiter allows to receive RESTART and RELOAD commands.
This patch is for calling 'reload-shinken' defined command.
Tested on my environment.
Add tests for external commands

- RESTART_PROGRAM and RELOAD_CONFIG
- HOST_ACK and SVC_ACK
Finish tests for external commands
Fix: bad default timezone