Add matrix entry for Riak 2.0.0pre5.
Remove master exclusion for now.
Escape if clause.
Merge branch 'master' into mm-riak-2.0
fix test for protocol buffer key fetch

this should only return the keys added (4) since we clean the bucket
between tests
it's enough to clean after all tests are done
Merge branch 'mm-riak-2.0' into riak-2.0