hasErrors is hard-coded to false for at least GitLab and Jenkins

[darraghjones]

hasErrors is not set correctly. Therefore errorsFirst does not work correctly.

https://github.com/marcells/node-build-monitor/blob/master/app/services/GitLab.js#L103

https://github.com/marcells/node-build-monitor/blob/master/app/services/Jenkins.js#L172