[keycloak-dev] subsystem integration phase 1

[Bill Burke]

Going to iterate on this.  The admin console UI could end up different 
in the end, but for phase 1 this is what I've decided to do:

* Get rid of RequiredApplicationCredentials.  Applications will have a 
viewable client secret from admin console.  This will be resetable form 
admin console too.  (cloud.google.com allows you to view the client secret)
* Application Install page will now just have a select list.  Options 
will be: "config file", "remote wildfly".  Basically all integration 
points we support.
* "config file" will display what we have now, except credential will be 
set up as client secret will be exposed
* "remote wildfly" will bring you to a page that asks for:

- URL of Wildfly admin
- username and password of wildfly instance
- deployment name
- A "Configure" button

Clicking the configure button will remotely set up the wildfly 
subsystem.  Creating a realm if it doesn't already exist, then creating 
the deployment.

-- 
Bill Burke
JBoss, a division of Red Hat
http://bill.burkecentral.com