Before this commit the following happened sometimes:
1. action status is connected
2. action config is updated to something that should change the status to
disconnected
3. action status is still connected and the old config is being used by
the connector even though the config has been correctly updated.
The reason for this bug is that the post_config_hook runs before the
global EMQX config is updated. The post config hook is adding the new
config to the connector. Since the new config causes the action to get
status disconnected, the adding of the action to the connector is
retried when the health check runs but this time the config will be
loaded from the global config which could cause the old config to be
loaded (this happens when the global config has not had time to get
updated).
The above problem has been fixed in this commit by only reading action
configs from the global config when the connector starts/restarts and
instead store the latest configs for the actions in the connector.
Fixes:
https://emqx.atlassian.net/browse/EMQX-12376
917474f694