RPM Support

``pulp-admin rpm repo update`` provides the following new options for updating a repository:

  --rsync-ssh-user           - ssh user for remote server
  --rsync-ssh-identity-file  - Absolute path to the private key that will be
                               used as the identity file for ssh. The key has
                               to be readable by user apache.
  --rsync-host               - The hostname of the remote server.
  --rsync-root               - Absolute path to the remote root directory where
                               all the data (content and published content)
                               lives. Remote equivalent to /var/lib/pulp. The
                               repository’s relative url is appended to the
                               root to determine the location of published
                               repository.
  --rsync-content-units-only - If true, the distributor will publish content
                               units only (e.g. /var/lib/pulp/content). The
                               symlinks of a published repository will not be
                               rsynced.
  --rsync-skip-repodata      - If true, repodata will be omitted from the
                               publish.
  --rsync-delete             - If true, --delete is appended to the rsync
                               command for symlinks and repodata so that any old
                               files no longer present in the local published
                               directory are removed from the remote server.
  --rsync-remote-units-path  - the relative path from the root where unit files
                               should live. Defaults to content/units.

When the user specifies a --rsync-ssh-user option, an ``rpm_rsync_distributor`` is added to the repository. The ``predistributor_id`` for the rsync distributor is ``yum_distributor``. If an rsync distributor already exists for the repository, the distributor config is updated.