[keycloak-dev] Rename WildFly subsystem

I've merged the code bases so that we just have a single subsystem for both WildFly and EAP/AS7. Working great on both (yay!). So the EAP subsystem will be removed from the code base and I now just have the WildFly subsystem that works for both. Can anyone think of a reason why I shouldn't rename this to "keycloak-subsystem" instead of "keycloak-wildfly-subsystem"? The only problem I can think of is that it will break existing user's standalone.xml files that refer to the old name.||