check_http_puppetmaster: set timeout to 60

icinga-wm is bombarding the channel with Puppetmaster timeout alerts. The
response times mentioned in the recovery reports are just a shadow below the
timeout, so we can expect the service to flap constantly. This sets the timeout
to 60. It doesn't fix the underlying problem, but then neither does having a
bot scream about it on IRC.

Change-Id: I36e0f853b5ca67b5534135d94c1984a1cca24d38
Merge "check_http_puppetmaster: set timeout to 60" into production