Fix nova flag parsing
Fix nova flag parsing

We need to use parse_args() so the default config file is used.

Change-Id: I7af19d77477e98b8181b1bce3d9cea1e86fca160
Signed-off-by: Julien Danjou <5c682c2d1ec4073e277f9ba9f4bdf07e5794dabe@danjou.info>

MisterPup/Ceilometer-Juno-Extension,redhat-openstack/ceilometer,rickerc/ceilometer_audit,pczerkas/aodh,pkilambi/ceilometer,ityaptin/ceilometer,luogangyi/Ceilometer-oVirt,dreamhost/ceilometer,tanglei528/ceilometer,openstack/aodh,pkilambi/ceilometer,idegtiarov/ceilometer,froyobin/ceilometer,isyippee/ceilometer,m1093782566/openstack_org_ceilometer,JioCloud/ceilometer,mathslinux/ceilometer,pczerkas/aodh,chungg/aodh,openstack/aodh,maestro-hybrid-cloud/ceilometer,dreamhost/ceilometer,openstack/ceilometer,luogangyi/Ceilometer-oVirt,JioCloud/ceilometer,eayunstack/ceilometer,rackerlabs/instrumented-ceilometer,citrix-openstack-build/ceilometer,shootstar/ctest,rickerc/ceilometer_audit,redhat-openstack/ceilometer,sileht/aodh,m1093782566/openstack_org_ceilometer,r-mibu/ceilometer,JioCloud/ceilometer,NeCTAR-RC/ceilometer,r-mibu/ceilometer,Juniper/ceilometer,mathslinux/ceilometer,citrix-openstack-build/ceilometer,ityaptin/ceilometer,chungg/aodh,fabian4/ceilometer,rickerc/ceilometer_audit,eayunstack/ceilometer,idegtiarov/ceilometer,citrix-openstack-build/ceilometer,froyobin/ceilometer,Juniper/ceilometer,NeCTAR-RC/ceilometer,cernops/ceilometer,shootstar/ctest,fabian4/ceilometer,isyippee/ceilometer,NeCTAR-RC/ceilometer,tanglei528/ceilometer,rackerlabs/instrumented-ceilometer,rackerlabs/instrumented-ceilometer,cernops/ceilometer,openstack/ceilometer,sileht/aodh,MisterPup/Ceilometer-Juno-Extension,tanglei528/ceilometer,maestro-hybrid-cloud/ceilometer