Remove conversion debug message
Remove conversion debug message

Removing unnecessary debug message confusing the user to
think the error is fatal. Instead just let it pass silently
to avoid confusion. The debug message wasnt adding much
value anyway.

Closes-Bug: #1306280

Change-Id: I03420311f0a6ec77d68b750afce3c4110ccffecf

maestro-hybrid-cloud/ceilometer,isyippee/ceilometer,r-mibu/ceilometer,sileht/aodh,maestro-hybrid-cloud/ceilometer,openstack/ceilometer,m1093782566/openstack_org_ceilometer,cernops/ceilometer,r-mibu/ceilometer,froyobin/ceilometer,fabian4/ceilometer,mathslinux/ceilometer,ityaptin/ceilometer,luogangyi/Ceilometer-oVirt,isyippee/ceilometer,froyobin/ceilometer,m1093782566/openstack_org_ceilometer,tanglei528/ceilometer,mathslinux/ceilometer,openstack/aodh,tanglei528/ceilometer,eayunstack/ceilometer,idegtiarov/ceilometer,eayunstack/ceilometer,openstack/aodh,idegtiarov/ceilometer,redhat-openstack/ceilometer,luogangyi/Ceilometer-oVirt,cernops/ceilometer,MisterPup/Ceilometer-Juno-Extension,pkilambi/ceilometer,pczerkas/aodh,openstack/ceilometer,ityaptin/ceilometer,sileht/aodh,redhat-openstack/ceilometer,fabian4/ceilometer,tanglei528/ceilometer,MisterPup/Ceilometer-Juno-Extension,Juniper/ceilometer,pkilambi/ceilometer,Juniper/ceilometer,pczerkas/aodh,chungg/aodh,chungg/aodh