VMware: improve log message for attachment of CDROM
VMware: improve log message for attachment of CDROM

Commit 3c59d998c5e6b80549053b01f919ac318cd31b13 config drive
support. The log message makes use of the instance_name which is
not unique. The may be confusing when debugging.

TrivialFix

Change-Id: Iff7f4f938f4980f0c0bf2dc3017ed741453a69f5

BeyondTheClouds/nova,gooddata/openstack-nova,vmturbo/nova,devendermishrajio/nova,maelnor/nova,apporc/nova,gooddata/openstack-nova,klmitch/nova,cyx1231st/nova,tianweizhang/nova,devendermishrajio/nova_test_latest,watonyweng/nova,barnsnake351/nova,redhat-openstack/nova,rahulunair/nova,watonyweng/nova,alaski/nova,double12gzh/nova,openstack/nova,ruslanloman/nova,gooddata/openstack-nova,silenceli/nova,jianghuaw/nova,whitepages/nova,devendermishrajio/nova_test_latest,JianyuWang/nova,dims/nova,maelnor/nova,tudorvio/nova,badock/nova,rajalokan/nova,yosshy/nova,JioCloud/nova,CEG-FYP-OpenStack/scheduler,dims/nova,viggates/nova,zzicewind/nova,virtualopensystems/nova,Yusuke1987/openstack_template,angdraug/nova,noironetworks/nova,felixma/nova,klmitch/nova,Tehsmash/nova,nikesh-mahalka/nova,takeshineshiro/nova,affo/nova,jianghuaw/nova,double12gzh/nova,rajalokan/nova,CloudServer/nova,mgagne/nova,mahak/nova,nikesh-mahalka/nova,sebrandon1/nova,silenceli/nova,Stavitsky/nova,vmturbo/nova,scripnichenko/nova,hanlind/nova,j-carpentier/nova,apporc/nova,mandeepdhami/nova,belmiromoreira/nova,jianghuaw/nova,phenoxim/nova,devendermishrajio/nova,bgxavier/nova,badock/nova,edulramirez/nova,adelina-t/nova,Francis-Liu/animated-broccoli,cloudbase/nova-virtualbox,sebrandon1/nova,mahak/nova,mmnelemane/nova,NeCTAR-RC/nova,affo/nova,ted-gould/nova,berrange/nova,thomasem/nova,projectcalico/calico-nova,vmturbo/nova,Juniper/nova,yosshy/nova,iuliat/nova,isyippee/nova,adelina-t/nova,zaina/nova,varunarya10/nova_test_latest,rahulunair/nova,mikalstill/nova,alvarolopez/nova,fnordahl/nova,cyx1231st/nova,fnordahl/nova,tianweizhang/nova,hanlind/nova,LoHChina/nova,MountainWei/nova,JioCloud/nova_test_latest,jeffrey4l/nova,dawnpower/nova,NeCTAR-RC/nova,viggates/nova,zzicewind/nova,virtualopensystems/nova,orbitfp7/nova,blueboxgroup/nova,rajalokan/nova,eayunstack/nova,Juniper/nova,redhat-openstack/nova,isyippee/nova,blueboxgroup/nova,CCI-MOC/nova,CloudServer/nova,projectcalico/calico-nova,varunarya10/nova_test_latest,whitepages/nova,BeyondTheClouds/nova,openstack/nova,jianghuaw/nova,Metaswitch/calico-nova,Stavitsky/nova,tealover/nova,mahak/nova,joker946/nova,eonpatapon/nova,yatinkumbhare/openstack-nova,eayunstack/nova,tangfeixiong/nova,zaina/nova,joker946/nova,akash1808/nova_test_latest,scripnichenko/nova,openstack/nova,gooddata/openstack-nova,saleemjaveds/https-github.com-openstack-nova,TwinkleChawla/nova,CCI-MOC/nova,eonpatapon/nova,berrange/nova,bgxavier/nova,barnsnake351/nova,Tehsmash/nova,Metaswitch/calico-nova,raildo/nova,petrutlucian94/nova,jeffrey4l/nova,cloudbase/nova,sebrandon1/nova,belmiromoreira/nova,klmitch/nova,zhimin711/nova,cernops/nova,alvarolopez/nova,alaski/nova,klmitch/nova,tangfeixiong/nova,orbitfp7/nova,tudorvio/nova,takeshineshiro/nova,akash1808/nova,ted-gould/nova,Juniper/nova,vladikr/nova_drafts,Yusuke1987/openstack_template,Juniper/nova,kimjaejoong/nova,CEG-FYP-OpenStack/scheduler,cloudbase/nova,alexandrucoman/vbox-nova-driver,cernops/nova,shail2810/nova,mikalstill/nova,zhimin711/nova,edulramirez/nova,akash1808/nova_test_latest,cloudbase/nova,noironetworks/nova,MountainWei/nova,ruslanloman/nova,felixma/nova,shail2810/nova,j-carpentier/nova,iuliat/nova,angdraug/nova,hanlind/nova,mandeepdhami/nova,cernops/nova,raildo/nova,phenoxim/nova,rajalokan/nova,mgagne/nova,cloudbase/nova-virtualbox,BeyondTheClouds/nova,mmnelemane/nova,JianyuWang/nova,akash1808/nova,alexandrucoman/vbox-nova-driver,petrutlucian94/nova,vmturbo/nova,saleemjaveds/https-github.com-openstack-nova,vladikr/nova_drafts,yatinkumbhare/openstack-nova,thomasem/nova,dawnpower/nova,bigswitch/nova,bigswitch/nova,JioCloud/nova_test_latest,kimjaejoong/nova,mikalstill/nova,Francis-Liu/animated-broccoli,TwinkleChawla/nova,LoHChina/nova,JioCloud/nova,tealover/nova,rahulunair/nova