generate *-test.jar for unit tests for reef-tests; add JUnit to shaded jars; started runtests.ps1 script
add test suite that includes all other tests in reef-tests (to run on YARN) + minor refactoring
add logging parameter to runreef.ps1 script
bugfix: use $LogParams for java logging option to avoid name collision
Merge branch 'master' of github.com:Microsoft-CISL/REEF into sergiym_yarn_tests
Merge pull request #744 from Microsoft-CISL/sergiym_yarn_tests

Various improvements in reef-tests