Previously, the logic decided that it didn't need to look at the
sub-projects, as the main package is disabled. However, if it was
previously enabled the --disable didn't touch the branched packages in
the sub-projects and those stayed enabled.

- Had old logic for distribution
- Removed '--all' flag to disentangle functionality
  Use mpcdf_setup_subproject if you want to re-create all enabled
  repositories for all packages

Merge changes for new OBS from obs-api branch

See merge request !3

This often avoids making an API call to the server completely, if the
generated XML can be shown to be the same as the existing.

Packages that were completely disabled or enabled only for 'system' were
still branched into all sub-projects.

- Add 'Runscripts: mpcdf' for 'hcpsw' group creation
- Pre-install a package containing the microarch directories

No with more than one configured API url on my .oscrc it becomes
apparent that this argument was erroneously omitted in the past in many
places.