Initialize iptables rules on initialization of MetadataManager
Initialize iptables rules on initialization of MetadataManager

To avoid multiple initialization of iptables rules if there are a few
workers for metadata service, perform iptables configuration in
__init__() of MetadataManager.

Change-Id: I674c04f973318f06cbb98693f0a884c824af8748
Closes-Bug: #1097999

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