Add line in mysql setup to ensure that sbin is in path
Add line in mysql setup to ensure that sbin is in path

mysqld is installed to sbin by default, so if sbin is not in your
path, the tests will fail to set up properly.

Change-Id: I8ca72822ccf19046d1f5634245e972f184f5675a

stackforge/refstack,stackforge/refstack,openstack/refstack,openstack/refstack,openstack/refstack,stackforge/refstack,stackforge/refstack,openstack/refstack