Update openstack/common/periodic_task
Update openstack/common/periodic_task

The following commits are in this update:

1771a77 Adjust import order according to PEP8 imports rule
4bfb7a2 Apply six for metaclass
0ea069e Removed calls to locals()
1a2df89 Enable H302 hacking check

Change-Id: I5d15d9772002a2f764acef16e28bcfa16a9760c0

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