Sync can_send_version() helper from oslo-incubator.
Sync can_send_version() helper from oslo-incubator.

This patch syncs a helper method added to the RpcProxy class from
oslo-incubator.

Change-Id: Ifd374245c15cef7af7487a19935193b590c1bd4e

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