tests: Resolve Coverity RESOURCE_LEAK

The cleanup path did not clear the reference for sk1 and sk2
Signed-off-by: NJohn Ferlan <jferlan@redhat.com>

tests/virnetdaemontest.c

@@ -125,6 +125,8 @@ testCreateServer(const char *host, int family)
     virObjectUnref(cln2);
     virObjectUnref(svc1);
     virObjectUnref(svc2);
+    virObjectUnref(sk1);
+    virObjectUnref(sk2);
     return srv;
 
  error: