Wait for command in worlddump
Wait for command in worlddump

Wait for the command to complete and catch errors when running
commands.

Change-Id: I2c93b3bdd930ed8564e33bd2d45fe4e3f08f03f5

vsham20/devstack,noironetworks/devstack,varunarya10/devstack,ozamiatin/devstack,flavio-fernandes/devstack,eharney/devstack,noironetworks/devstack,pacinete/devstack,bq-xiao/devstack,upadhyay-prashant/devstack,thomasem/devstack,ozamiatin/devstack,eharney/devstack,atulpatil301/devstack,olivierlemasle/devstack,upadhyay-prashant/devstack,costingalan/devstack,Mahito/devstack,bigswitch/devstack,mssumanth/devstack,richliu/devstack,bswartz/devstack,vsham20/devstack,dirkmueller/devstack,avvocatodemarchis/devstack,bq-xiao/devstack,liuquansheng47/devstack,pczerkas/devstack,openstack-dev/devstack,NaokiMiyata/devstack,mssumanth/devstack,dirkmueller/devstack,HPCHub/devstack,pacinete/devstack,TwinkleChawla/devstack,HPCHub/devstack,bswartz/devstack,mc2014/devstack,pombredanne/devstack,liuquansheng47/devstack,mc2014/devstack,group-policy/devstack,Mahito/devstack,vishnugonela/devstack,vishnugonela/devstack,parul24/devstack,herrsechs/devstack,dtroyer/devstack,openstack-dev/devstack,richliu/devstack,samgoon/devstack,prithivm/branch01,NaokiMiyata/devstack,dtroyer/devstack,wenhuizhang/devstack,pczerkas/devstack,costingalan/devstack,herrsechs/devstack,wenhuizhang/devstack,TwinkleChawla/devstack,nawawi/openstack,mmasaki/devstack,atulpatil301/devstack,samgoon/devstack,prithivm/branch01,thomasem/devstack,mmasaki/devstack,pombredanne/devstack,varunarya10/devstack,avvocatodemarchis/devstack,parul24/devstack,flavio-fernandes/devstack,group-policy/devstack,olivierlemasle/devstack,bigswitch/devstack,nawawi/openstack