* Add PiperGoUtils for downloading piper binary
PiperGoUtils provide the link between a Jenkins library step and the library step execution running in a go binary.
It makes sure that an adequate binary is available.
* fix CodeClimate finding
* Remove Delimiter and add download resilience.
This step allows to restart a set of steps in order to retry in case of e.g. infrastructure failures which first need to be fixed.
* update documentation