oprinmarius: Support custom azuredisk driver install url

JobBuild
2064
09-20 07:27
pull-perf-tests-clusterloader2 1572125237753942016
pull-perf-tests-clusterloader2-kubemark 1572125237800079360
pull-perf-tests-verify-all-python 1572125237837828096
pull-perf-tests-verify-lint 1572125237909131264
pull-perf-tests-verify-test 1572125237871382528