ENG-4760: split junit test into "junit_regression" and "junit_other"; and further split regression tests into "junit_regression_h1" and "junit_regression_h2".
ENG-4760: refactor junit and junit_regression targets.
ENG-4760: Jenkin doesn't support "regex" in filename, refactor using patternset; only create test output dir once for one single run (remove "depends").
Merge pull request #698 from VoltDB/ENG-4760

ENG-4760: split junit test into "junit_regression" and "junit_other"; an...