Fix swift restart error
Fix swift restart error

'swift-init all {restart|stop}' exits with '1' if there are any problems
sutting down any swift server, including if they were not running to begin with.
An attempt to address this has already been ignored by the Swift team, and it
would not have completely eliminated the problem, so we'll just be defensive here.

Change-Id: Ib8e30221e1c8873d0e849add89dc87d5ccda9d82

sc68cal/devstack,dirkmueller/devstack,Yuriy-Leonov/devstack,ykaneko/devstack,savi-dev/devstack,vishnugonela/devstack,liuquansheng47/devstack,nati/devstack_public,TwinkleChawla/devstack,nuxeh/devstack,upadhyay-prashant/devstack,ozamiatin/devstack,Mahito/devstack,r-mibu/devstack,CloudServer/devstack,LoHChina/devstack,mssumanth/devstack,atulpatil301/devstack,kplus/devstack-moonshot,eshnil2000/devstack,flavio-fernandes/devstack,Mahito/devstack,LoHChina/devstack,nati/devstack_public,prithivm/branch01,yamt/devstack,bljgaurav/openstack-test,bswartz/devstack,BSJAIN92/OpenStack,mc2014/devstack,costingalan/devstack,BSJAIN92/OpenStack,herrsechs/devstack,dtroyer/devstack,nttmcl/devstack_public,prithivm/branch01,upadhyay-prashant/devstack,parul24/devstack,avvocatodemarchis/devstack,dtroyer/devstack,HPCHub/devstack,ewindisch/raspi-devstack,mmasaki/devstack,noironetworks/devstack,ewindisch/raspi-devstack,bq-xiao/devstack,varunarya10/devstack,liuquansheng47/devstack,rushiagr/devstack,tianweizhang/devstack,jamielennox/devstack,promptworks/devstack,olivierlemasle/devstack,pczerkas/devstack,eharney/devstack,pombredanne/devstack,vishnugonela/devstack,CloudServer/devstack,citrix-openstack-build/devstack,Millnert/contrail-devstack,pombredanne/devstack,pacinete/devstack,affo/devstack,group-policy/devstack,sstrato/devstack,wenhuizhang/devstack,pczerkas/devstack,eharney/devstack,citrix-openstack-build/devstack,ykaneko/devstack,wenhuizhang/devstack,mmasaki/devstack,virtualopensystems/devstack,promptworks/devstack,JioCloud/devstack,richliu/devstack,vsham20/devstack,nawawi/openstack,CiscoSystems/devstack,mssumanth/devstack,tianweizhang/devstack,andrewrothstein/devstack,NaokiMiyata/devstack,neerja28/Devstack_GlusterFS,nawawi/openstack,dirkmueller/devstack,nttmcl/devstack_public,olivierlemasle/devstack,sc68cal/devstack,sequenceiq/devstack,innodee/openstackk,parul24/devstack,noironetworks/devstack,affo/devstack,ozamiatin/devstack,r-mibu/devstack,cloudbuilders/devstack,srics/devstack,thomasem/devstack,openstack-dev/devstack,shootstar/devstacktest,sequenceiq/devstack,inkerra/devstack,deepakselvaraj/devstack,j4/devstack,bljgaurav/openstack-test,costingalan/devstack,herrsechs/devstack,group-policy/devstack,richliu/devstack,rushiagr/devstack,HPCHub/devstack,bswartz/devstack,bq-xiao/devstack,vsham20/devstack,samgoon/devstack,varunarya10/devstack,andrewrothstein/devstack,neerja28/Devstack_GlusterFS,samgoon/devstack,bigswitch/devstack,cloudbuilders/devstack,williamthegrey/devstack,pacinete/devstack,mc2014/devstack,TwinkleChawla/devstack,j4/devstack,atulpatil301/devstack,Juniper/devstack,armando-migliaccio/devstack,kplus/devstack-moonshot,bigswitch/devstack,nuxeh/devstack,flavio-fernandes/devstack,thomasem/devstack,NaokiMiyata/devstack,openstack-dev/devstack,savi-dev/devstack,avvocatodemarchis/devstack