a few tweaks - remove unused member functions, add comment
a few tweaks - remove unused member functions, add comment

usc-isi/nova,petrutlucian94/nova_dev,DirectXMan12/nova-hacking,TwinkleChawla/nova,eayunstack/nova,savi-dev/nova,double12gzh/nova,salv-orlando/MyRepo,Francis-Liu/animated-broccoli,sridevikoushik31/openstack,yrobla/nova,cloudbase/nova-virtualbox,maheshp/novatest,ewindisch/nova,mgagne/nova,bgxavier/nova,tianweizhang/nova,psiwczak/openstack,maoy/zknova,TieWei/nova,berrange/nova,Triv90/Nova,j-carpentier/nova,imsplitbit/nova,adelina-t/nova,sridevikoushik31/nova,aristanetworks/arista-ovs-nova,JioCloud/nova,dstroppa/openstack-smartos-nova-grizzly,silenceli/nova,josephsuh/extra-specs,mikalstill/nova,phenoxim/nova,russellb/nova,mandeepdhami/nova,shootstar/novatest,zaina/nova,edulramirez/nova,leilihh/nova,MountainWei/nova,mmnelemane/nova,maheshp/novatest,watonyweng/nova,silenceli/nova,tudorvio/nova,kimjaejoong/nova,plumgrid/plumgrid-nova,eonpatapon/nova,Juniper/nova,paulmathews/nova,gooddata/openstack-nova,sebrandon1/nova,russellb/nova,blueboxgroup/nova,cyx1231st/nova,nikesh-mahalka/nova,CloudServer/nova,alvarolopez/nova,affo/nova,josephsuh/extra-specs,eneabio/nova,akash1808/nova,paulmathews/nova,Yuriy-Leonov/nova,jianghuaw/nova,savi-dev/nova,felixma/nova,varunarya10/nova_test_latest,affo/nova,salv-orlando/MyRepo,DirectXMan12/nova-hacking,akash1808/nova_test_latest,tangfeixiong/nova,Juniper/nova,gspilio/nova,petrutlucian94/nova,NoBodyCam/TftpPxeBootBareMetal,dims/nova,MountainWei/nova,JianyuWang/nova,tudorvio/nova,spring-week-topos/nova-week,klmitch/nova,sridevikoushik31/nova,bigswitch/nova,vmturbo/nova,BeyondTheClouds/nova,JianyuWang/nova,ruslanloman/nova,watonyweng/nova,usc-isi/extra-specs,sileht/deb-openstack-nova,zzicewind/nova,devendermishrajio/nova_test_latest,cloudbase/nova,double12gzh/nova,gooddata/openstack-nova,Yusuke1987/openstack_template,jianghuaw/nova,rajalokan/nova,russellb/nova,psiwczak/openstack,Tehsmash/nova,projectcalico/calico-nova,iuliat/nova,kimjaejoong/nova,mikalstill/nova,mandeepdhami/nova,badock/nova,OpenAcademy-OpenStack/nova-scheduler,ewindisch/nova,cloudbau/nova,Metaswitch/calico-nova,imsplitbit/nova,bclau/nova,salv-orlando/MyRepo,vmturbo/nova,houshengbo/nova_vmware_compute_driver,CiscoSystems/nova,sebrandon1/nova,BeyondTheClouds/nova,scripnichenko/nova,devoid/nova,phenoxim/nova,viggates/nova,takeshineshiro/nova,rahulunair/nova,eneabio/nova,bgxavier/nova,belmiromoreira/nova,CCI-MOC/nova,josephsuh/extra-specs,psiwczak/openstack,klmitch/nova,ruslanloman/nova,tealover/nova,jeffrey4l/nova,thomasem/nova,Francis-Liu/animated-broccoli,mikalstill/nova,orbitfp7/nova,usc-isi/nova,NoBodyCam/TftpPxeBootBareMetal,maoy/zknova,whitepages/nova,rrader/nova-docker-plugin,devendermishrajio/nova,luogangyi/bcec-nova,zhimin711/nova,iuliat/nova,petrutlucian94/nova,SUSE-Cloud/nova,Triv90/Nova,zzicewind/nova,sacharya/nova,jianghuaw/nova,redhat-openstack/nova,aristanetworks/arista-ovs-nova,shahar-stratoscale/nova,yosshy/nova,yatinkumbhare/openstack-nova,eneabio/nova,saleemjaveds/https-github.com-openstack-nova,eayunstack/nova,openstack/nova,klmitch/nova,mmnelemane/nova,bigswitch/nova,raildo/nova,CEG-FYP-OpenStack/scheduler,whitepages/nova,felixma/nova,dawnpower/nova,akash1808/nova_test_latest,Juniper/nova,sridevikoushik31/openstack,cyx1231st/nova,sridevikoushik31/nova,rajalokan/nova,belmiromoreira/nova,eharney/nova,blueboxgroup/nova,Tehsmash/nova,eonpatapon/nova,mahak/nova,savi-dev/nova,usc-isi/extra-specs,dims/nova,noironetworks/nova,isyippee/nova,NewpTone/stacklab-nova,dawnpower/nova,gooddata/openstack-nova,scripnichenko/nova,qwefi/nova,shail2810/nova,berrange/nova,raildo/nova,fajoy/nova,citrix-openstack-build/nova,varunarya10/nova_test_latest,hanlind/nova,SUSE-Cloud/nova,CCI-MOC/nova,angdraug/nova,sileht/deb-openstack-nova,Brocade-OpenSource/OpenStack-DNRM-Nova,CEG-FYP-OpenStack/scheduler,maelnor/nova,CloudServer/nova,tangfeixiong/nova,redhat-openstack/nova,noironetworks/nova,vladikr/nova_drafts,Triv90/Nova,viggates/nova,devendermishrajio/nova,alaski/nova,hanlind/nova,NeCTAR-RC/nova,leilihh/novaha,gspilio/nova,houshengbo/nova_vmware_compute_driver,leilihh/novaha,fnordahl/nova,NeCTAR-RC/nova,ntt-sic/nova,alexandrucoman/vbox-nova-driver,cloudbase/nova-virtualbox,sridevikoushik31/openstack,Yusuke1987/openstack_template,cernops/nova,sacharya/nova,mahak/nova,LoHChina/nova,j-carpentier/nova,LoHChina/nova,dstroppa/openstack-smartos-nova-grizzly,barnsnake351/nova,apporc/nova,JioCloud/nova_test_latest,Brocade-OpenSource/OpenStack-DNRM-Nova,cloudbau/nova,rickerc/nova_audit,KarimAllah/nova,hanlind/nova,joker946/nova,tanglei528/nova,shootstar/novatest,cloudbase/nova,TieWei/nova,NewpTone/stacklab-nova,KarimAllah/nova,tealover/nova,joker946/nova,rajalokan/nova,maoy/zknova,fnordahl/nova,adelina-t/nova,alaski/nova,yosshy/nova,leilihh/nova,fajoy/nova,Metaswitch/calico-nova,tanglei528/nova,CiscoSystems/nova,maelnor/nova,saleemjaveds/https-github.com-openstack-nova,BeyondTheClouds/nova,rajalokan/nova,thomasem/nova,houshengbo/nova_vmware_compute_driver,vladikr/nova_drafts,dstroppa/openstack-smartos-nova-grizzly,rahulunair/nova,DirectXMan12/nova-hacking,cloudbase/nova,alvarolopez/nova,citrix-openstack-build/nova,devoid/nova,rrader/nova-docker-plugin,akash1808/nova,apporc/nova,yatinkumbhare/openstack-nova,shail2810/nova,sridevikoushik31/nova,jianghuaw/nova,OpenAcademy-OpenStack/nova-scheduler,paulmathews/nova,gooddata/openstack-nova,fajoy/nova,sebrandon1/nova,rahulunair/nova,Yuriy-Leonov/nova,badock/nova,bclau/nova,NoBodyCam/TftpPxeBootBareMetal,barnsnake351/nova,cernops/nova,Stavitsky/nova,zaina/nova,usc-isi/extra-specs,isyippee/nova,JioCloud/nova_test_latest,jeffrey4l/nova,spring-week-topos/nova-week,qwefi/nova,JioCloud/nova,openstack/nova,mahak/nova,cernops/nova,vmturbo/nova,gspilio/nova,eharney/nova,ntt-sic/nova,tianweizhang/nova,TwinkleChawla/nova,yrobla/nova,orbitfp7/nova,plumgrid/plumgrid-nova,sileht/deb-openstack-nova,shahar-stratoscale/nova,devendermishrajio/nova_test_latest,ted-gould/nova,vmturbo/nova,klmitch/nova,openstack/nova,virtualopensystems/nova,rickerc/nova_audit,nikesh-mahalka/nova,ted-gould/nova,zhimin711/nova,Stavitsky/nova,NewpTone/stacklab-nova,aristanetworks/arista-ovs-nova,edulramirez/nova,angdraug/nova,alexandrucoman/vbox-nova-driver,petrutlucian94/nova_dev,usc-isi/nova,virtualopensystems/nova,takeshineshiro/nova,luogangyi/bcec-nova,yrobla/nova,maheshp/novatest,projectcalico/calico-nova,Juniper/nova,KarimAllah/nova,mgagne/nova