Revert "[BEAM-2264] Credentials were not being reused between GCS calls"
Revert "[BEAM-2264] Credentials were not being reused between GCS calls"

This reverts commit 4045e3285d939e3e8169f278d47bc7fdc86bcbdf.

robertwb/incubator-beam,RyanSkraba/beam,markflyhigh/incubator-beam,charlesccychen/beam,robertwb/incubator-beam,apache/beam,apache/beam,rangadi/beam,charlesccychen/beam,markflyhigh/incubator-beam,lukecwik/incubator-beam,charlesccychen/incubator-beam,lukecwik/incubator-beam,rangadi/beam,rangadi/beam,apache/beam,apache/beam,charlesccychen/incubator-beam,robertwb/incubator-beam,lukecwik/incubator-beam,charlesccychen/beam,lukecwik/incubator-beam,chamikaramj/beam,chamikaramj/beam,robertwb/incubator-beam,charlesccychen/beam,robertwb/incubator-beam,lukecwik/incubator-beam,lukecwik/incubator-beam,chamikaramj/beam,markflyhigh/incubator-beam,rangadi/beam,RyanSkraba/beam,robertwb/incubator-beam,markflyhigh/incubator-beam,RyanSkraba/beam,tgroh/beam,robertwb/incubator-beam,chamikaramj/beam,tgroh/beam,iemejia/incubator-beam,chamikaramj/beam,iemejia/incubator-beam,rangadi/incubator-beam,rangadi/incubator-beam,markflyhigh/incubator-beam,tgroh/incubator-beam,RyanSkraba/beam,tgroh/incubator-beam,charlesccychen/beam,mxm/incubator-beam,charlesccychen/beam,apache/beam,chamikaramj/beam,robertwb/incubator-beam,mxm/incubator-beam,apache/beam,apache/beam,lukecwik/incubator-beam,RyanSkraba/beam,RyanSkraba/beam,robertwb/incubator-beam,lukecwik/incubator-beam,rangadi/incubator-beam,lukecwik/incubator-beam,chamikaramj/beam,markflyhigh/incubator-beam,RyanSkraba/beam,lukecwik/incubator-beam,apache/beam,apache/beam,chamikaramj/beam,rangadi/beam,robertwb/incubator-beam,tgroh/beam,apache/beam,tgroh/beam,markflyhigh/incubator-beam,charlesccychen/beam,apache/beam,chamikaramj/beam,charlesccychen/incubator-beam,rangadi/beam,chamikaramj/beam,rangadi/beam