The monitoring test, i.e., "Monitoring should verify monitoring pods and all
cluster nodes are available on influxdb using heapster" has been failing on the
Trusty release job for a while and it is known that it won't be fixed until the
next kubernetes release, see https://github.com/google/cadvisor/issues/947 for
more details.

Let's blacklist it so that the release job can be used to catch other real
issues.