Change Ubuntu version to 14.04
Change Ubuntu version to 14.04

Closes-Bug: #1498555

Change-Id: I1be2e69a8faefdc53790196d9cabf4210cc209f4

huntxu/fuel-web,huntxu/fuel-web,SmartInfrastructures/fuel-web-dev,stackforge/fuel-web,eayunstack/fuel-web,huntxu/fuel-web,huntxu/fuel-web,eayunstack/fuel-web,eayunstack/fuel-web,SmartInfrastructures/fuel-web-dev,huntxu/fuel-web,SmartInfrastructures/fuel-web-dev,stackforge/fuel-web,eayunstack/fuel-web,SmartInfrastructures/fuel-web-dev,stackforge/fuel-web,SmartInfrastructures/fuel-web-dev,eayunstack/fuel-web