Fix DockerClient default URL test
Fix DockerClient default URL test

mbrukman/flocker,jml/flocker,hackday-profilers/flocker,wallnerryan/flocker-profiles,wallnerryan/flocker-profiles,w4ngyi/flocker,jml/flocker,achanda/flocker,jml/flocker,agonzalezro/flocker,w4ngyi/flocker,adamtheturtle/flocker,achanda/flocker,agonzalezro/flocker,hackday-profilers/flocker,adamtheturtle/flocker,moypray/flocker,1d4Nf6/flocker,wallnerryan/flocker-profiles,AndyHuu/flocker,lukemarsden/flocker,Azulinho/flocker,Azulinho/flocker,runcom/flocker,adamtheturtle/flocker,achanda/flocker,agonzalezro/flocker,LaynePeng/flocker,1d4Nf6/flocker,AndyHuu/flocker,LaynePeng/flocker,runcom/flocker,w4ngyi/flocker,mbrukman/flocker,Azulinho/flocker,AndyHuu/flocker,LaynePeng/flocker,lukemarsden/flocker,runcom/flocker,hackday-profilers/flocker,1d4Nf6/flocker,moypray/flocker,mbrukman/flocker,moypray/flocker,lukemarsden/flocker