[keycloak-dev] generic model migration

[Bill Burke]

I implemented this as a singleton data item in JPA or Mongo or File.  I 
jsut store the current version.  Implementation is in 
MigrationModelManager and it just checks the currently stored version 
versus the deployed version.  Its all hardcoded at the moment, but does 
give some abstraction.  I think it is good enough going forward.  Don't 
need anything fancy.
-- 
Bill Burke
JBoss, a division of Red Hat
http://bill.burkecentral.com