Update go.mod and fix old golang container image issue

Update imports

Add stack labels to gosbench resources

This way we can select and delete everything with
oc get all -l stack=gosbench
oc delete all -l stack=gosbench

Also disabled debug mode in workers since it polluted the log file...
If anything goes wrong, we have the error logs.

Update dependencies

Needs proper testing...

Release v0.2

Add Unit Tests to server

Coverage of ~12% since most is network communication