Add jobs for cliff integration tests

Add check and gate jobs for cliff to test against
consuming projects neutronclient and openstackclient
using a technique similar to the one used by pecan.

Change-Id: If20992cb4160c80253253cec2cb53b9df74543b2
Remove unit tests against Puppet 3.0.x

rspec-puppet doesn't work with Puppet 3.0.x anymore. This is caused
by a bug within Puppet itself. There is no plan to release
a fix for Puppet 3.0.x any time soon. There was also no solution
found by rspec-puppet to restore support for Puppet 3.0.x.

This change removes unit tests against Puppet 3.0.x so no more cycles
are spent testing a broken version. Unit tests were non-voting anyway.

Change-Id: I582d2be45afc3bbd21ee39e7255ca0e39da9840f
Merge "Add jobs for cliff integration tests"
Merge "Remove unit tests against Puppet 3.0.x"