Changes to support both "contrial-admin-ui" and "vcenter-ui" in parallel based on URL given
contrail-admin-ui accessed via "/login"
vcenter-ui accessed via "/vcenter/login"
1. In case of only vcenter mode, when user tries to access "/login", set orchestration as none
2. For ajax calls issued from UI, X-OrchestrationMode header is passed with the orchestration fetched during login from webServer.
    And on webserver,will compare the orchestration mode recieved from request with one stored in session and if doesn't match,logout the session and take to login page
3. Switching between contrail-admin-ui and vcenter-ui modes from same browser
    a. If a request other than login comes for contrail-admin-ui and if session has vmware_soap_session,implies that current session is authenticated with vCenter, so logout the session and take to login page
    b. If a request other than login comes for vcenter-ui and if session doesn't has vmware_soap_session,implies that current session is authenticated with none orchestration,so logout the session and take to login page

Change-Id: I1fefecff9ae19328bf76da3bad232ab4cb1882ee
Merge "Changes to support both "contrial-admin-ui" and "vcenter-ui" in parallel based on URL given contrail-admin-ui accessed via "/login" vcenter-ui accessed via "/vcenter/login" 1. In case of only vcenter mode, when user tries to access "/login", set orchestration as none 2. For ajax calls issued from UI, X-OrchestrationMode header is passed with the orchestration fetched during login from webServer.     And on webserver,will compare the orchestration mode recieved from request with one stored in session and if doesn't match,logout the session and take to login page 3. Switching between contrail-admin-ui and vcenter-ui modes from same browser     a. If a request other than login comes for contrail-admin-ui and if session has vmware_soap_session,implies that current session is authenticated with vCenter, so logout the session and take to login page     b. If a request other than login comes for vcenter-ui and if session doesn't has vmware_soap_session,implies that current session is authenticated with none orchestration,so logout the session and take to login page"