Skara should honor .gitconfig and /etc/gitconfig

In SKARA-868, the fix to ignore .gitconfig and /etc/gitconfig was applied universally, which is causing trouble for users. The intention from the filer was to just disable this when running the Skara tests. I still think we should have a way to ignore gitconfig when running tests, but we need to keep honoring the git configuration at runtime.

Myself and other users are now either running Skara with a local patch disabling SKARA-868, or simply updated our repos to the change right before.