Debian Support

Convert the pulp_deb to use MongoEngine models for all unit actions instead of the associated unit

Deliverables:

• ContentUnit model for docker_image units
  • The model is registered via the entry point
  • The types .json file is removed, and references to it in the spec files are are also removed
• All interactions with units in the plugin use the new unit model and the Repository model for creating, saving and updating units
• Convert the model according to the conversion guide

Supported operations:

Milestone 1:

• Create repository to host deb packages
• Add deb unit to deb repository (implementation detail: importer needs to work)
• Publish apt repository (implementation detail: distributor needs to work)
• Sign repository metadata within the distributor

Milestone 2:

• Ability to sync a repo produced at milestone 1 (one dist, one component, one architecture)

To be done later:

• Full mirror support - problematic for several reasons:
  • we need a way to keep track of which deb unit came from which dist/component/architecture
  • in order to not invalidate the repo metadata signature, we may have to save the repo metadata files and publish exactly those.
• Partial mirror
  • ability to specify a whitelist of dist/component/architecture combinations to be synced