Add an equality method for CloudConfig
Add an equality method for CloudConfig

In order to track if a config has changed, we need to be able to compare
the CloudConfig objects for equality.

Change-Id: Icdd9acede81bc5fba60d877194048e24a62c9e5d

dtroyer/python-openstacksdk,switch-ch/os-client-config,redhat-openstack/os-client-config,stackforge/python-openstacksdk,openstack/os-client-config,dtroyer/os-client-config,dtroyer/python-openstacksdk,openstack/python-openstacksdk,openstack/python-openstacksdk,stackforge/python-openstacksdk