Seems OpenAM has own solution to integrate into containers 
If PicketLink could be in any way helpful with integrating I recommend to look into Keycloack, which should replace PicketLink. As PicketLink is currently deprecated.
I am looking in OpenAM Agent 5 too, but it seems the latest supported WildFly version is 10, not yest supported WildFly 11.
Can you share me some useful guideline to work with Keycloack.