[QGIS-Developer] SIP coverage test removal and Travis optimization

[Matthias Kuhn 🌍]

> 
> Or something like 
> %Include auto_generated_files.sip
> with a file with all of them.

Sounds good, yes.

> 
> Anyway, something like this, yes.
> 
> Would you prefer the CMake or the script approach?
> I find it weird that CMake would output files which would be written in
> the source, so I would vote for the script.
> 

Yes, for debugging a script might be good. But I would see this as a
short-term solution. I find it strange to have CMake output files in the
source but also strange to track generated files in sip (but I
understand that it's a good thing for debugging now).

Matthias