Remove INACTIVE status from FWaaS

DOWN status is introduced to replace INACTIVE status. There is one
place in FWaaS code which still checks INACTIVE status.

This commit removes INACTIVE status from FWaaS.

Change-Id: I896c81a6229978a46f8a88a31936920a1036f142
Partial-Bug: #1286048
Merge "Remove INACTIVE status from FWaaS"