Regression test suite has grown considerably and is taking too long to
run with a single wrapper. Splitting them into individual standalone
tests instead and making them run in parallel.
It is designed for RHEL only. The switch for distros used to live in the
regression.sh script but it was removed so now the tests need to know if
they are running on a compatible system themselves.
Create an entry point for all regression test called "regression.sh" and
run it as part of the base tests for all our distros. This entry
point contains logic for running only the test cases that are
appropriate for a given distribution.
