Do not translate debug messages
Do not translate debug messages

LOG.debug messages do not need to be translated. The rdb driver
has a couple of debug messages that are translated. This patch
removes those debug translations.

Also, logging exception.ImageUnacceptable can contain non-ascii
characters. This patch fixes this by using six.text_type to
properly translate the exception.

Change-Id: I4ed36173f42b7bf487463f148ae94bd061f6bebb

hguemar/cinder,mahak/cinder,Paul-Ezell/cinder-1,abusse/cinder,Hybrid-Cloud/cinder,manojhirway/ExistingImagesOnNFS,blueboxgroup/cinder,blueboxgroup/cinder,CloudServer/cinder,alex8866/cinder,rakeshmi/cinder,winndows/cinder,CloudServer/cinder,NetApp/cinder,tlakshman26/cinder-https-changes,scottdangelo/RemoveVolumeMangerLocks,openstack/cinder,Akrog/cinder,j-griffith/cinder,Paul-Ezell/cinder-1,julianwang/cinder,Datera/cinder,alex8866/cinder,saeki-masaki/cinder,petrutlucian94/cinder,leilihh/cinder,Datera/cinder,takeshineshiro/cinder,Accelerite/cinder,potsmaster/cinder,takeshineshiro/cinder,hguemar/cinder,scottdangelo/RemoveVolumeMangerLocks,eharney/cinder,nikesh-mahalka/cinder,apporc/cinder,nikesh-mahalka/cinder,bswartz/cinder,tlakshman26/cinder-new-branch,apporc/cinder,Akrog/cinder,tlakshman26/cinder-bug-fix-volume-conversion-full,phenoxim/cinder,Accelerite/cinder,potsmaster/cinder,scality/cinder,mahak/cinder,Nexenta/cinder,abusse/cinder,bswartz/cinder,redhat-openstack/cinder,julianwang/cinder,j-griffith/cinder,dims/cinder,duhzecca/cinder,ge0rgi/cinder,nexusriot/cinder,winndows/cinder,sasukeh/cinder,rakeshmi/cinder,cloudbase/cinder,tlakshman26/cinder-new-branch,duhzecca/cinder,nexusriot/cinder,JioCloud/cinder,tlakshman26/cinder-https-changes,saeki-masaki/cinder,Hybrid-Cloud/cinder,redhat-openstack/cinder,NetApp/cinder,JioCloud/cinder,Nexenta/cinder,cloudbase/cinder,sasukeh/cinder,scality/cinder,petrutlucian94/cinder,openstack/cinder,dims/cinder,tlakshman26/cinder-bug-fix-volume-conversion-full,phenoxim/cinder,manojhirway/ExistingImagesOnNFS,eharney/cinder,leilihh/cinder