Jenkins fails the whole build immediately if any stage fails. Hadoop2 tests run before Hadoop3 tests.
So Hadoop3 tests will run only if hadoop2 tests pass.
* Jenkinsfile that works for all current branches.
* adds dev-support script for setting parameters for our yetus nightly invocation
* quiets the "zip test results" step
Signed-off-by: tedyu <yuzhihong@gmail.com>