CFY-1046 add threshold policy + test
CFY-1046 update node name where stream to accept all group members and not just the first
Merge pull request #123 from cloudify-cosmo/CFY-1046-threshold-policy

Cfy 1046 threshold policy
Bump version to 3.1m3
Merge branch 'master' of github.com:cloudify-cosmo/cloudify-manager into CFY-1193-remove-python-webserver-test
CFY-1193 fix flake