Fix various smaller issues

[michaelsauter]

• Adds debug statement when project / component is auto-resolved (there was a related failure which I could not reproduce now, but at least one would see more info when debug is enabled now)
• Makes overriding of projectKey and projectName consistent (otherwise e.g. ods-doc-gen-svc QS fails because the behaviour of sonar-scanner and cnesreport.jar was inconsistent). On a side note, I realised that overriding projectKey is, technically speaking, a backwards incompatible change. However, my understanding is that you want to enforce it, right @clemensutschig?
• Adds a check if the target directory exists. @clemensutschig do you remember why we changed it from out, which is what I had initially, to the value of componentId? If it doesn't need to be componentId, then I actually propose to make a further change and switch back to out to be really safe.

[clemensutschig]

• Adds a check if the target directory exists. @clemensutschig do you remember why we changed it from out, which is what I had initially, to the value of componentId? If it doesn't need to be componentId, then I actually propose to make a further change and switch back to out to be really safe.

in the fork case - there was an error, as the directory already existed, I believe ...