Coverage report improvement for GO packages

[stellasun2016]

Is your feature request related to a problem? Please describe.
In current Infrabox support for coverage reporting, we can upload the coverage file with xml format: cobertura and clover to /infrabox/upload/coverage. Infrabox can show the coverage data in the job view. The column Branches, Functions are empty for GO coverage file.

examples:
https://infrabox.datahub.only.sap/dashboard/#/project/devops-xian/build/76/1/job/unit-tests-code-coverage
https://infrabox.datahub.only.sap/dashboard/#/project/vsystem/build/22741/1/job/generator%2Fintegration-tests

The elements of the GO coverage result file seem not being parsed correctly.

Describe the solution you'd like
Please help to improve the coverage reporting for GO packages.