add updated configuring-nodes-storage doc
add updated configuring-nodes-storage doc

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