ceph: simplify arguments to getConfigEnvVars method
ceph: simplify arguments to getConfigEnvVars method

The method to construct osd environment variables is simplified
by passing a struct param instead of individual params

Signed-off-by: Travis Nielsen <a8b474fdb3f77f44446f0ab9ddca8147b09b3a9e@redhat.com>

rook/rook,rook/nfs,rook/rook,rook/rook,rook/nfs,rook/rook,rook/rook,rook/nfs