Revert of Fix utils.ServiceAccountHttp(). (patchset #1 id:1 of https://codereview.chromium.org/2337143003/ )
Revert of Fix utils.ServiceAccountHttp(). (patchset #1 id:1 of https://codereview.chromium.org/2337143003/ )

Reason for revert:
Reverting this to revert:
https://codereview.chromium.org/2299703004/

That CL is suspected in:
http://crbug.com/648633
500 errors while uploading benchmark results to perf dashboard.

Original issue's description:
> Fix utils.ServiceAccountHttp().
>
> Committed: https://chromium.googlesource.com/external/github.com/catapult-project/catapult/+/3d7a0942bcf44f2f94cf605c14fb4c209d1fff14

TBR=sullivan@chromium.org
# Not skipping CQ checks because original CL landed more than 1 days ago.

Review-Url: https://codereview.chromium.org/2360813002

benschmaus/catapult,catapult-project/catapult,benschmaus/catapult,catapult-project/catapult,catapult-project/catapult,catapult-project/catapult,catapult-project/catapult-csm,catapult-project/catapult-csm,benschmaus/catapult,sahiljain/catapult,sahiljain/catapult,benschmaus/catapult,catapult-project/catapult-csm,catapult-project/catapult-csm,catapult-project/catapult-csm,catapult-project/catapult,catapult-project/catapult-csm,catapult-project/catapult,sahiljain/catapult,catapult-project/catapult-csm,catapult-project/catapult,sahiljain/catapult,benschmaus/catapult,sahiljain/catapult,benschmaus/catapult,benschmaus/catapult,sahiljain/catapult