Mark puppet 3.0 unit tests as non-voting

Recent release of rspec-puppet 1.0.x exposed a bug in Puppet 3.0.2.
This breaks our gates and prevents changes from going through.

We wish to disable the gate until we find the root cause
and a permanent solution.

Change-Id: I8b7c9e59b4e92a54b23eee5af34da4761f92a906
Merge "Mark puppet 3.0 unit tests as non-voting"