Workaround pyrsistent bug.
Workaround pyrsistent bug.

mbrukman/flocker,wallnerryan/flocker-profiles,mbrukman/flocker,agonzalezro/flocker,hackday-profilers/flocker,mbrukman/flocker,w4ngyi/flocker,hackday-profilers/flocker,AndyHuu/flocker,AndyHuu/flocker,wallnerryan/flocker-profiles,wallnerryan/flocker-profiles,hackday-profilers/flocker,w4ngyi/flocker,agonzalezro/flocker,AndyHuu/flocker,w4ngyi/flocker,agonzalezro/flocker