CFY-1215

Manually tested for basic functionality. Used https://github.com/achirko/cloudify-openstack-plugin/blob/dev/plugin.yaml as plugin definition and https://github.com/achirko/cloudify-openstack-plugin/blob/dev/blueprint.yaml as a base for testing.
It seems like all your license headers are missing the first line, look here for reference:
https://github.com/cloudify-cosmo/cloudify-openstack-plugin/blob/master/nova_plugin/server.py

(this is just for having the exact header in all source files)