Get trigger status

[lixingwang]

Current behavior:
This is no way to collect all trigger status
Expected behavior:
Should expose engine api to get all trigger status. just like old: flogoEngine.TriggerInfos()
What is the motivation / use case for changing the behavior?

Additional information you deem important (e.g. I need this tomorrow):

[mellistibco]

@lixingwang whats the use case you are thinking of?

[lixingwang]

@mellistibco we bundled flogo engines which may have multiple triggers into a container, our infrastructure side continues to check the engine status. We expose an API which collection all trigger status and response back to infrastructure.

[lixingwang]

@mellistibco we will take it as unhealthy if the trigger status becomes to fail.

[fm-tibco]

The ability to get the status is already in the code. From the engine you can get the App(), and from the app you can get TriggerStatuses()