Get the expiry time from keystone token expires and set that as the session timeout value
Get the expiry time from keystone token expires and set that as the session
timeout value

Change-Id: Ia8c662d504e62d0a5e5c016c26ea8da11b481d19

nagakiran/contrail-web-core,varunarya10/contrail-web-core,biswajit-mandal/contrail-web-core,varunarya10/contrail-web-core,hari-sk/contrail-web-core,hari-sk/contrail-web-core,hari-sk/contrail-web-core,nagakiran/contrail-web-core,biswajit-mandal/contrail-web-core,vishnuvv/contrail-web-core,vishnuvv/contrail-web-core,nagakiran/contrail-web-core,biswajit-mandal/contrail-web-core,varunarya10/contrail-web-core,vishnuvv/contrail-web-core