MacOS support in closed tests. Currently the tests fail with

#section:shell
----------messages:(3/132)----------
command: shell CheckPackagesLock.sh []
reason: User specified action: run shell CheckPackagesLock.sh
elapsed time (seconds): 0.021
----------System.out:(2/76)----------
TESTJAVA=/export/local/common/jdk/baseline/macos-amd64
Unrecognized system!
----------System.err:(0/0)----------
result: Failed. Execution failed: exit code 1


test result: Failed. Execution failed: exit code 1