remove `-loops' option because it is not supported
remove `-loops' option because it is not supported

- on CentOS (IceHouse) we ship `ip' that do not support `-loops'

Closes-bug: #1349483
Change-Id: I84119d7c68f0f007076d3ff43a1ad79df70d2722

huntxu/fuel-library,eayunstack/fuel-library,xarses/fuel-library,SmartInfrastructures/fuel-library-dev,Metaswitch/fuel-library,slystopad/fuel-lib,eayunstack/fuel-library,xarses/fuel-library,huntxu/fuel-library,stackforge/fuel-library,ddepaoli3/fuel-library-dev,zhaochao/fuel-library,SmartInfrastructures/fuel-library-dev,zhaochao/fuel-library,slystopad/fuel-lib,eayunstack/fuel-library,zhaochao/fuel-library,huntxu/fuel-library,SmartInfrastructures/fuel-library-dev,xarses/fuel-library,SmartInfrastructures/fuel-library-dev,ddepaoli3/fuel-library-dev,huntxu/fuel-library,huntxu/fuel-library,xarses/fuel-library,ddepaoli3/fuel-library-dev,Metaswitch/fuel-library,Metaswitch/fuel-library,ddepaoli3/fuel-library-dev,eayunstack/fuel-library,zhaochao/fuel-library,eayunstack/fuel-library,stackforge/fuel-library,ddepaoli3/fuel-library-dev,stackforge/fuel-library,slystopad/fuel-lib,Metaswitch/fuel-library,slystopad/fuel-lib,SmartInfrastructures/fuel-library-dev,stackforge/fuel-library,zhaochao/fuel-library