Do not abort t_client run if OpenVPN instance does not start.

Do not abort t_client run if OpenVPN instance does not start.

Basically, an oversight - if one test instance does not start at all
(due to "tap driver not loaded") the whole script would exit, instead
of logging the failing instance and proceeding to the next test run.

Signed-off-by: Gert Doering <gert@greenie.muc.de>
Acked-by: David Sommerseth <davids@openvpn.net>
Message-Id: 20160913200458.9906-1-gert@greenie.muc.de
URL: http://www.mail-archive.com/search?l=mid&q=20160913200458.9906-1-gert@greenie.muc.de
Signed-off-by: David Sommerseth <davids@openvpn.net>
(cherry picked from commit a7b02f7f660707f765881f35867b4d23d89b390f)