Fail test action when test suite fails. Minor README update.

cluster/juju/layers/kubernetes-e2e/README.md

@@ -73,7 +73,7 @@ a deployed cluster. The following example will skip the `Flaky`, `Slow`, and
 `Feature` labeled tests:
 
 ```shell
-juju run-action kubernetes-e2e/0 skip='\[(Flaky|Slow|Feature:.*)\]'
+juju run-action kubernetes-e2e/0 test skip='\[(Flaky|Slow|Feature:.*)\]'
 ```
 
 > Note: the escaping of the regex due to how bash handles brackets.

cluster/juju/layers/kubernetes-e2e/actions/test

@@ -45,3 +45,7 @@ tar -czf $ACTION_LOG_TGZ ${JUJU_ACTION_UUID}.log
 
 action-set log="$ACTION_LOG_TGZ"
 action-set junit="$ACTION_JUNIT_TGZ"
+
+if tail ${JUJU_ACTION_UUID}.log | grep -q "Test Suite Failed"; then
+  action-fail "Failure detected in the logs"
+fi