Refactor display of cluster
Refactor display of cluster

Change-Id: I3b8cfc9c91af300a22b14963f82ec372c416ad41
Implements: blueprint python-savannaclient-cli

citrix-openstack-build/python-saharaclient,citrix-openstack-build/python-saharaclient,openstack/python-saharaclient,citrix-openstack-build/python-saharaclient