remove gwicke from icinga contactgroups

fix broken icinga reload

follow-up to I77f412fc202c187fa3

Error: /Stage[main]/Icinga::Monitor::Service/Service[icinga]:
Failed to call refresh: Could not restart Service[icinga]:
Execution of '/etc/init.d/icinga reload' returned 6:

Error: /Stage[main]/Icinga::Monitor::Service/Service[icinga]:
Could not restart Service[icinga]:
Execution of '/etc/init.d/icinga reload' returned 6:

Error: Could not find any contact matching 'gwicke'
(config file '/etc/icinga/contactgroups.cfg', starting on line 32)

Error: Could not expand member contacts specified in contactgroup
(config file '/etc/icinga/contactgroups.cfg', starting on line 32)

Change-Id: Id1406c28db32919352a40347394aaddf368b20b8
Merge "remove gwicke from icinga contactgroups" into production