Update node-type names. #210
Description
Update all node-type naming convention from cloudify.openstack.nodes.Type to cloudify.nodes.openstack.Type.
For example, cloudify.openstack.nodes.Server should now be cloudify.nodes.openstack.Server and cloudify.openstack.port_connected_to_security_group should be cloudify.relationships.openstack.port_connected_to_security_group.