Right exit code when running only selected tests
Right exit code when running only selected tests

Many "echos" were hiding exit code returned by tox

Change-Id: I0e7ed985f61d19cd528544116f5d6bf8048b3c77
Closes-Bug: #1439057

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