Fix boto capabilities check
Fix boto capabilities check

In commit 4845fc27 a capability check for the boto library has been
accidentally broken. boto.connection existed in all versions and it
was HTTPResponse class that should cause the ImportError.
Exception will not happen on the import line anymore, so check the
capabilities using hasattr() instead.

Change-Id: Ic9bff71b91de685a958400f12836322c7ca996c4

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