Exclude xenapi plugins from pep8/hacking checks.
Exclude xenapi plugins from pep8/hacking checks.

Fixes LP Bug #987055.

Change-Id: I7132b88c5e0a90b16d0f8e35df45b82e7991280f

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