Fix devstack plugin's usage of RECLONE option

Current code redefines "reclone" option and devstack
always reclones manila's code. It should depend on
devstack's localrc definition of reclone

Change-Id: Ie04895a12e348c08329fc5cc1d997710daed056f
Closes-Bug: 1279799
Merge "Fix devstack plugin's usage of RECLONE option"