Added spec for contrail global controller webui changes
Added spec for contrail global controller webui changes

Change-Id: I017bf3df603c698f59a47f96a814d2cb50e2be13
Related-bug: #1649251

biswajit-mandal/contrail-web-controller,vishnuvv/contrail-web-controller,biswajit-mandal/contrail-web-controller,biswajit-mandal/contrail-web-controller,vishnuvv/contrail-web-controller,vishnuvv/contrail-web-controller