Add neutron groups
Add neutron groups

Change-Id: Ib562d234e9519e1bad981db3817b163e31a5ea16

SergK/fuel-main,zhaochao/fuel-main,zhaochao/fuel-main,dancn/fuel-main-dev,eayunstack/fuel-main,SergK/fuel-main,Fiware/ops.Fuel-main-dev,AnselZhangGit/fuel-main,dancn/fuel-main-dev,SmartInfrastructures/fuel-main-dev,dancn/fuel-main-dev,huntxu/fuel-main,ddepaoli3/fuel-main-dev,AnselZhangGit/fuel-main,eayunstack/fuel-main,teselkin/fuel-main,teselkin/fuel-main,zhaochao/fuel-main,huntxu/fuel-main,Fiware/ops.Fuel-main-dev,zhaochao/fuel-main,teselkin/fuel-main,SmartInfrastructures/fuel-main-dev,huntxu/fuel-main,SergK/fuel-main,ddepaoli3/fuel-main-dev,stackforge/fuel-main,zhaochao/fuel-main,stackforge/fuel-main,Fiware/ops.Fuel-main-dev,teselkin/fuel-main,AnselZhangGit/fuel-main,SmartInfrastructures/fuel-main-dev,SmartInfrastructures/fuel-main-dev,Fiware/ops.Fuel-main-dev,dancn/fuel-main-dev,stackforge/fuel-main,AnselZhangGit/fuel-main,eayunstack/fuel-main,ddepaoli3/fuel-main-dev,ddepaoli3/fuel-main-dev