Merge pull request #57 from nagakiran/dashboardChanges

1. Moved common dashboard code to contrail-web-core repository
Done BGP peer changes in both nodejs and ui for address family and hold time
Merge pull request #58 from sbavanasi/BGP-Peer

Done BGP peer changes in both nodejs and ui for address family and hold ...
Fixed the issue that vrouter dashboard tab is not rendered correctly in
Firefox