CFY-1049 add schema for policy types and groups, add imports support for these
CFY-1049 process groups with policy types and support imports + tests
CFY-1049 flake8
Merge branch 'master' into CFY-1049-policies
CFY-1049 verify at least one group member
CFY-1049 flake8
Merge pull request #13 from cloudify-cosmo/CFY-1049-policies

Cfy 1049 policies