Correct parsing of test result

The regex for parsing the test result is incorrect, leading to the test
reporting a pass rather than a fail as it should be. Change the regex to
make it report the correct result.

Signed-off-by: Martyn Welch <martyn.welch@collabora.com>

test-cases/iptables-basic.yaml

@@ -44,4 +44,4 @@ run:
     - common/run-test-in-systemd --timeout=900 --name=run-test env DEBUG=2 ./run-test.sh
 
 parse:
-  pattern: ^(?P<test_case_id>[a-zA-Z0-9_\-\./]+):\s*(?P<result>pass|fail|skip|unknown)$
+  pattern: "(?P<test_case_id>.*_*):\\s+(?P<result>(pass|fail|skip))"