Simplify group retrieval handler
Simplify group retrieval handler

telefonicaid/iotagent-node-lib,caiothomas/iotagent-node-lib,telefonicaid/iotagent-node-lib,caiothomas/iotagent-node-lib,caiothomas/iotagent-node-lib,telefonicaid/iotagent-node-lib