[keycloak-dev] Added 'keycloak-server.json' to configure server

[Stian Thorgersen]

Keycloak is now configured through keycloak-server.json (standalone/deployments/auth-server.war/WEB-INF/classes/META-INF/keycloak-server.json).

This file let's you configure:

* Model provider - including hostname/port/etc for Mongo
* Audit provider - including hostname/port/etc for Mongo
* Theme - default theme name and dir
* Scheduled - interval to run scheduled tasks

I've also added an SPI interface, which is used to detect and load SPI's. Currently the following SPI's are registered:

* ModelSpi
* AuditProviderSpi
* AuditListenerSpi
* AuthenticationSpi
* IdentityManagerSpi
* TimerSpi

There's a few 'providers' that needs to still be updated, these are themes, import/export and social.