let logparser.py parse_event() change disconnected path events to 'ERROR'

This means that aa-logprof will ignore the event instead of crashing with
    AppArmorException: 'Unexpected rank input: var/run/nscd/passwd'

Note that I made the check as specific as possible to be sure it doesn't
hide other events.

References: https://bugzilla.opensuse.org/show_bug.cgi?id=918787


Acked-by: Steve Beattie <steve@nxnw.org>



Also update test-capability.py - it contains a test that needs
    'error_code': 0,
added to avoid a failure.

Patch by: Steve Beattie <steve@nxnw.org>
Acked-by: Christian Boltz <apparmor@cboltz.de>

utils/test/test-capability.py

@@ -104,6 +104,7 @@ class CapabilityTest(unittest.TestCase):
         self.assertEqual(parsed_event, {
             'request_mask': set(),
             'denied_mask': set(),
+            'error_code': 0,
             'magic_token': 0,
             'parent': 0,
             'profile': '/bin/ping',