Address review comment: Make get_node_state take a cluster.
Address review comment: Make get_node_state take a cluster.

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