Add new gem popen4
Add new gem popen4

Change-Id: I2cb24d23298f7289b67ec68ee46093123b723124
Related-Bug: #1268861

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