Fix typo error
Fix typo error

Fix typo error in StochasticHostWeightHandler.

Change-Id: I141ef7ba204a556642f5891b1da19c8dad220d1d

openstack/cinder,eharney/cinder,Datera/cinder,mahak/cinder,j-griffith/cinder,mahak/cinder,phenoxim/cinder,Datera/cinder,openstack/cinder,j-griffith/cinder,eharney/cinder,phenoxim/cinder