test error log - catch dummy error
test error log - catch dummy error

we load a dummy db in test which is expected to failed. it should
be caught accordingly so it doesn't flood logs

Change-Id: I9f5ce01619a963dbe3bb7936ac1ffd4ba06b25e2
Closes-Bug: #1468379

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