It's actually fine to have a single .changes file for multiple .spec files
in the same package, OBS picks that automatically. Relax the check to only
require a single .changes file for the package name.
Many multi-spec packages currently just duplicate the changes files anyway,
which can be avoided.
With osc 0.171, the service execution engine was changed to explicitly
only start the services in a specific mode (i.e. runlocal only runs services
with mode="local").
On openSUSE:Factory, the _service definition though contains mode="disabled" for service download_files
This in turn leads to confusion as to how to get the files downloaded locally.
The 'service runall $FOO' variant runs the specified service no matter what mode it is declared
Helps clarify for https://github.com/openSUSE/osc/issues/874
