Combine exit codes of the two functional test runs
Combine exit codes of the two functional test runs

The script was only returning the exit code of the second of the
two test runs.  With this change, a failure of either either run
will correctly be reported as an error.

Change-Id: I81766dee2ac141ceddf683b50a2aef11a79f968b
Closes-bug: #1488693

openstack/barbican,openstack/barbican