Adding section that states the need of ceph-tools on all hosts
Adding section that states the need of ceph-tools on all hosts

Fixes #464

rook/rook,aramisjohnson/rook,rook/rook,aramisjohnson/rook,aramisjohnson/rook,rook/nfs,rook/rook,gcmalloc/rook,rook/nfs,rook/rook,rook/rook,gcmalloc/rook,rook/nfs