Improve error message for duplicate EE components

The Java EE specs require that certain beans be registered and made available for injection/use by applications. On occasion, end-user applications can accidentally attempt to register beans that conflict with these spec-mandated names. For example, if an application has an EJB with the class name Validator, the deployment will fail, as the system has already registered a bean of that name via the Bean Validation subsystem. In these instances, the error reporting should contain enough information to know what name is conflicting and, if possible, the source of the conflict.