migrate parsoid jobs from master to slaves

I had use `export` for the environnement variables.

Updated jobs:

parsoid-parse-tool-check
parsoid-parsertests
parsoid-parsertests-run
parsoid-parsertests-run-harder
parsoid-regressions
parsoid-roundtrip-test-check

Bug: 50234
Change-Id: Ia9754978098bf9a164ca443d8454fd9b0a622dc9