https://github.com/saltstack/salt/pull/45583 was opened to fix some test
failures in the daemons tests. However, with the way that the tests were
written, `_multiproc_exec_test` was waiting for a response from the
child function, which would never come due to the error raised during
the test. This means that any exception raised during the test would
stop the test suite dead in its tracks, causing it to eventually end in
a timeout.
This commit addresses this design flaw by wrapping the test logic in a
try/except, and ensuring that we always return a response from the child
function. The tests will instead log the exception and gracefully fail
the test, allowing whomever troubleshoots the failures to consult the
salt-runtests.log to see the traceback.
