Fix to seperate provisioning conifg components without auth.

    Currently setup-vnc-config  assumes that the orchestrator is  open-stack and does
    provisioning of openstack config files, including setting the keystone authentication
    sections in the config services config files. Fixed it by seperating out provisioing of
    contrail config components and provisioning authentication

Change-Id: If72ca4d17842056b0788c243ec79bf97351a20fe
Partial-Bug: 1378502
Merge "Fix to seperate provisioning conifg components without auth."