Rename 'Download logs' to 'Download diagnostic snapshot'
Rename 'Download logs' to 'Download diagnostic snapshot'

Change-Id: I1d2297ce56f29253d643008bdd2656c4fdb43f13

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