Related-Bug#1506851 Removed the unused css class, which was added for underlay page.
Related-Bug#1506851
Removed the unused css class, which was added for underlay page.

Change-Id: I470d72f64a279a4cf45c493d29dc7aa646223c72

nagakiran/contrail-web-core,vishnuvv/contrail-web-core,nagakiran/contrail-web-core,vishnuvv/contrail-web-core,biswajit-mandal/contrail-web-core,vishnuvv/contrail-web-core,nagakiran/contrail-web-core,biswajit-mandal/contrail-web-core,biswajit-mandal/contrail-web-core