Make create_dataset choose same node deterministically as tests using it expect.
Make create_dataset choose same node deterministically as tests using it expect.

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