[CA-128364] & [CP-7396]: Fix tapdisk rrd plugin deregister call.
[CA-128364] & [CP-7396]: Fix tapdisk rrd plugin deregister call.

Signed-off-by: Siddharth Vinothkumar <siddharth.vinothkumar@citrix.com>
Reviewed-by: Vineeth Thampi Raveendran <vineeth.thampi@citrix.com>

GitHub: closes #88 on xapi-project/sm

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