Maven Dependency Strucuture Refactoring

[jinyoung]

Currently ProcessCodi project and the uEngine-bpm project has recursive reference relationship. So we need to build the project twice -

cd ../uengine-bpm
mvn install         <---- will fail when to build the final child project - uengine-social-bpm due to it has some API dependency from process-codi 
cd ../process-codi
mvn install         <---- will succeed
cd ../uengine-bpm
mvn install          <---- will now succeed.

To Remove its recursive dependency, just separate the uengine-social-bpm project as standalone project from the uengine-bpm.