Remove extra lines of code that result in
swift_test_client adding params twice to
PUT request urls.
Bug was revealed while developing functional
tests for SLO - SLO manifest PUTs behave incorrectly
because the url constructed by swift_test_client ends
with ?multipart-manifest=put?multipart-manifest=put
Fixes bug 1248121
Change-Id: Ie5a8651a55049bb52ef641edfd6eb29b0ff3c245
429cb8b745