Corrects some inconsistencies in REST API spec
Corrects some inconsistencies in REST API spec

Changes ids in json examples to uuids.
Changes example for adding role to plan to contain name and version.
Changes /v2/clouds to /v2/plans.

Change-Id: Id242a877b38409978ef337a1e4f5cc5955b21b95

openstack/tripleo-specs,openstack/tripleo-specs