Before this commit, the backend could not handle the test context for
message_validation_failed events that could be sent from the dashboard
since no handling code for this contexts existed in the backend. This
has now been fixed by adding such handling code.
Fixes:
https://emqx.atlassian.net/browse/EMQX-12354
This commit changes the default value for the
stop_action_after_template_rendering option of the apply rule HTTP API
endpoint so that it is true instead of false.
Kjell Winblad