Fixing heat stack status column

Status column on stack table was using stack_status instead of status
Status is a little more vague, but keeps Horizon from having to know
about all of the various Heat statuses (it was incorrectly displaying
progress meters for several of them before this fix)

Updated topology view with the same fix.

Implements: blueprint heat-fix-status-column
Change-Id: I3ad24d837dd5e9046aa8a91cce33b954b7a8e5d9