Set Default Width for Grid Columns
Set Default Width for Grid Columns

* Set the default width of a grid column to 150px

Change-Id: I13430e43e4b87c33e4b9c37e33da6d4193b1dfb0
Closes-Bug: #1641223

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