Remove openstack.common.exception usage
Remove openstack.common.exception usage

This file is deprecated, stop using it.

Change-Id: I5d79b8c0134bb5f4021487542d4d0a964281b8bf
Fixes-Bug: #1208734

hareeshpc/networking-cisco,Gitweijie/first_project,cisco-openstack/networking-cisco,Tehsmash/networking-cisco,Tehsmash/networking-cisco,noironetworks/networking-cisco,noironetworks/networking-cisco,Gitweijie/first_project,nikolay-fedotov/networking-cisco,openstack/networking-cisco,hareeshpc/networking-cisco,cisco-openstack/networking-cisco,CiscoSystems/networking-cisco,openstack/networking-cisco,CiscoSystems/networking-cisco