CP-6337: Added locking mechanism to wwid_conf
CP-6337: Added locking mechanism to wwid_conf

Signed-off-by: Germano Percossi <1811ef1c36bab1195f69031187febf2a003dfc12@citrix.com>
Reviewed-by: Keith Petley <31c3bee6d0aa6c2d1d765d11f7bde7042be3211e@citrix.com>

geosharath/sm,robertbreker/sm,xapi-project/sm,BobBall/sm,robertbreker/sm,pritha-srivastava/sm,BobBall/sm,siddharthv/sm,robertbreker/sm,pritha-srivastava/sm,martinjorge/sm,germanop/sm,martinjorge/sm,germanop/sm,martinjorge/sm,djs55/sm,djs55/sm,germanop/sm,BobBall/sm,malcolmcrossley/sm,malcolmcrossley/sm,chandrikas/sm,kostaslamda/sm,siddharthv/sm,kostaslamda/sm,chandrikas/sm,malcolmcrossley/sm,geosharath/sm,xapi-project/sm,chandrikas/sm,djs55/sm,kostaslamda/sm,geosharath/sm,siddharthv/sm,pritha-srivastava/sm,xapi-project/sm