In trusty-mitaka the mongodb charm is currently broken due
to incompatibility with a client update. This change pins it
to the latest working version until the incompatibility problem
is addressed.
In xenial-ocata, we are adding gnocchi and its dependencies to
the bundle in order to properly run zaza tests.
This change is equivalent as https://review.opendev.org/739153
for the ceilometer charm.
Change-Id: I8fcabc659e6e4b8628ec394353164e021c2c0e20
09a8566667