Add rule for example test output '... ok'

Change-Id: I6d5e9c8263de7e987c01b67432724f91a82d725e
diff --git a/mininet-test.rules b/mininet-test.rules
index b4151e4..d442326 100644
--- a/mininet-test.rules
+++ b/mininet-test.rules
@@ -13,3 +13,4 @@
 # Report passed tests in Info
 info /Test.*OK/
 info /Sanity.*OK/
+info /\.\.\. ok/