Add V3 API Test to get the VNC console of server

This patch adds V3 API Test to get the VNC console of server

Change-Id: I120163d0821eb7d8b2d62000be7cdd991925c341
Updated from global requirements

Change-Id: I94f7c442f0f0c8cdb342598c91d906444d5d5b18
Merge "Add V3 API Test to get the VNC console of server"
Merge "Updated from global requirements"
Merge branch 'master' of https://github.com/openstack/tempest