Check for duplicate names of clusters on first tab Fixes PRD-1769
Check for duplicate names of clusters on first tab
Fixes PRD-1769

Change-Id: I482ef482600bedc5c1a8f3bc135de40e7c33a35a

SmartInfrastructures/fuel-web-dev,stackforge/fuel-web,zhaochao/fuel-web,eayunstack/fuel-web,eayunstack/fuel-web,prmtl/fuel-web,koder-ua/nailgun-fcert,huntxu/fuel-web,koder-ua/nailgun-fcert,SmartInfrastructures/fuel-web-dev,SmartInfrastructures/fuel-web-dev,huntxu/fuel-web,zhaochao/fuel-web,prmtl/fuel-web,nebril/fuel-web,nebril/fuel-web,prmtl/fuel-web,prmtl/fuel-web,huntxu/fuel-web,SmartInfrastructures/fuel-web-dev,zhaochao/fuel-web,koder-ua/nailgun-fcert,nebril/fuel-web,stackforge/fuel-web,prmtl/fuel-web,nebril/fuel-web,koder-ua/nailgun-fcert,huntxu/fuel-web,stackforge/fuel-web,eayunstack/fuel-web,eayunstack/fuel-web,zhaochao/fuel-web,SmartInfrastructures/fuel-web-dev,nebril/fuel-web,zhaochao/fuel-web,huntxu/fuel-web,eayunstack/fuel-web