Using more of our CI, Coverage and cppcheck

[Àlex Fiestas]

Hi there!

During this weekend Ben and I have enabled the code-coverage in plasma-
framework, my personal idea is to enable it in most projects.

We should not go loco with code coverage, we stand where we stand and adding 
test non-stop will not fix anything. What we can do though is use this tool to 
make sure we don't make the situation worse, and to check which parts might 
need special love.
http://build.kde.org/job/plasma-framework_master_qt5/665/Variation=All,label=LINBUILDER/cobertura/

Also, most projects have cppcheck enabled, this thing is usually right so we 
want to to make it happy:
http://build.kde.org/job/plasma-framework_master_qt5/665/Variation=All,label=LINBUILDER/cppcheckResult/

If you want to enable it in more projects, look at:
https://techbase.kde.org/Development/Tutorials/Unittests#Coverage_tools_and_CI

Cheers!