tests: Allow more time for stress_connections tests

On *BSD and other platforms the stress_connections can timeout and
fail the tests. I've increased the timeout here to an hour as it
takes nearly that long on my VM environment but it seems that's not
common, luckily.

This was also seen on mips/mipsel.

Signed-off-by: Christine Caulfield <ccaulfie@redhat.com>