Issue#9

Issue #9 points out that bjyAuthorize has been updated and the schema has been modified such that it is no longer compatible with roleuserbridge. This update is a response to the changes in the bjyAuthorize schema. 
The linker.config.php has been updated with a new key to hold the id of the 'user' role in the user_role table.
RoleMapper::insert() has been modified so that the entity['role_id'] is updated from the value held in the linker.config.php file.