Test coverage tool is not working as it should

[VinGarcia]

I just merged a new PR and even though the codecov tool correctly detects that the new PR has 100% coverage it also thinks that the overall coverage of the project is now 77%, which makes no sense.

We'll have to investigate why this happened and fix it later.

This might either be a problem with codecov, or a change on how go test generate coverage reports.