icinga: Restore alarms for contint to #wikimedia-operations

We have monitoring of contint production services (Jenkins, Zuul) which
are sent to the Icinga contact group 'contint'. It has been made to send
notifications to #wikimedia-qa which is nice, but I would like them to
be sent to #wikimedia-operations as well as it used to be.  The reason
being it is more likely to be acted upon since ops have a better
coverage than Timo and I :]

Assume 'irc' is the proper contact group to achieve that.

Change-Id: I7f14241d32bd01cd27faa7939a4d8e64d565f10f
Merge "icinga: Restore alarms for contint to #wikimedia-operations" into production