Fix harcoded interface for ip show commnad
Fix harcoded interface for ip show commnad

fix harcoded interface for ip show command
in test delete vip.

Change-Id: Ia67e5464937af05fdf6cedf40652004b0edb1e2a
Closes-Bug: #1320146

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