[CBD-1286]: Modify nosetests target to use pump_upr_test.py

Change-Id: Ib89dcb9b48e33daff0a3367715740f543e3cf950
Reviewed-on: http://review.couchbase.org/34660
Reviewed-by: Bin Cui <bin.cui@gmail.com>
Reviewed-by: Eric Limare <eric.limare@couchbase.com>
Tested-by: Eric Limare <eric.limare@couchbase.com>