Add nagios-nrpe-plugin

[nicolasberens]

Icinga2 contains a definition for the check_nrpe command: https://github.com/Icinga/icinga2/blob/master/itl/command-plugins.conf#L2316

therefore the dependency for this command should also be installed.

[Al2Klimov]

Trivial to fix, but questionable. I mean, the image dropped also Live Status and Command Pipe.