config: Don't pull in config defaults twice

This would otherwise overwrite values set in the legacy config sections.

Closes: #733759
config: Don't pull in config defaults twice

This would otherwise overwrite values set in the legacy config sections.

Closes: #733759
Remove cover-min-percentage

It makes running single tests harder than necessary since it requires
the percentage also when using "nose <testname>".
import_dsc: Create missing debian branch with --create-missing-branches

Closes: #739888
git-import-dsc: Document --create-missing-branches
Document changes and release 0.6.10