Fix raise error when run "tox -egenconfig"
Fix raise error when run "tox -egenconfig"

In script ceilometer/cmd/alarm.py, OPTS is not exist,
remove this item.

Change-Id: I233c1550f3a7c26ec4bb8ff81a3050fc1ae73fa8
Closes-Bug: #1448897

ityaptin/ceilometer,isyippee/ceilometer,redhat-openstack/ceilometer,idegtiarov/ceilometer,isyippee/ceilometer,redhat-openstack/ceilometer,pkilambi/ceilometer,ityaptin/ceilometer,maestro-hybrid-cloud/ceilometer,openstack/aodh,cernops/ceilometer,pczerkas/aodh,sileht/aodh,r-mibu/ceilometer,chungg/aodh,sileht/aodh,mathslinux/ceilometer,eayunstack/ceilometer,pkilambi/ceilometer,openstack/ceilometer,openstack/ceilometer,mathslinux/ceilometer,chungg/aodh,cernops/ceilometer,idegtiarov/ceilometer,fabian4/ceilometer,eayunstack/ceilometer,maestro-hybrid-cloud/ceilometer,pczerkas/aodh,r-mibu/ceilometer,openstack/aodh,fabian4/ceilometer