Replace flocker docker plugin readme with link to the labs docs.
Replace flocker docker plugin readme with link to the labs docs.

wallnerryan/flocker-docker-plugin,mbrukman/flocker-docker-plugin,mbrukman/flocker-docker-plugin,moypray/flocker-docker-plugin,wallnerryan/flocker-docker-plugin,moypray/flocker-docker-plugin,hackday-profilers/flocker-docker-plugin,mbrukman/flocker-docker-plugin,hackday-profilers/flocker-docker-plugin,hackday-profilers/flocker-docker-plugin,wallnerryan/flocker-docker-plugin,moypray/flocker-docker-plugin