Fixed job execution status display
Fixed job execution status display

Column class expects get_raw_data method to be overwritten.
get_data makes more work on data like caching and filtering

Change-Id: Iaf742110d91014ddac19cea9bb84c3bbe93b7c87
Closes-Bug: #1333401

openstack/sahara-dashboard,openstack/sahara-dashboard,openstack/sahara-dashboard,openstack/sahara-dashboard