CFY-1590 created nova-net tests suite with nodecellar test
CFY-1276 use a standard centos image
CFY-1590 added comment in the nodecellar test code
Merge pull request #62 from cloudify-cosmo/CFY-1590-nova-net-support-for-3.1

CFY 1590 nova net support for 3.1
fixed nova net tests suite
CFY-1590 added nova net openstack handler; refactored openstack handler; fixed nova net nodecellar test
CFY-1590 fixed nova net openstack suite
CFY-1590 flake8 fixes
CFY-1590 removed unnecessary field in OpenstackNovaNetHandler
CFY-1590 removed unnecessary field in OpenstackNovaNetHandler
CFY-1590 fixed update_config.py script to support new nova net openstack handler
CFY-1590 fixed a typo in openstack nova net handler
CFY-1590 fixed a typo in openstack nova net handler
CFY-1590 added code to nodecellar test to avoid errors caused by elasticsearch consistency issues
Merge pull request #63 from cloudify-cosmo/CFY-1590-nova-net-system-test

CFY 1590 nova net system test
CFY-1303: Add tests for Openstack Cinder volumes
CFY-1303: Update tests to 3.1m4
CFY-1303: Update test

Update test blueprints to import main Openstack
plugin.yaml.
Update tosca_definitions_version field.
Update tests assertions.
Use one blueprint file for Cinder tests
Modify openstack_clients()

Return named tuple to not to change function and
code which uses the function every time new
Openstack client is needed.
Add Cinder client support.