CBQE-0: fix bug in setting of upr via basetestcase class

Change-Id: I423613abe0f9304af01d8f51e531dd9aa32997a1
Reviewed-on: http://review.couchbase.org/37666
Reviewed-by: Parag Agarwal <agarwal.parag@gmail.com>
Tested-by: Parag Agarwal <agarwal.parag@gmail.com>