MQE-1606: Mftf static check script should return error exit code when check fails

- Add to .gitignore

Author: tomreece

.gitignore

@@ -16,4 +16,6 @@ dev/tests/functional/MFTF.suite.yml
 dev/tests/functional/_output
 dev/mftf.log
 dev/tests/mftf.log
-dev/tests/docs/*
+dev/tests/docs/*
+dev/tests/_output
+dev/tests/functional.suite.yml