title: Some paster command not working in ckan 2.7.3
body: <p>Trying to use the info in:</p>
  
  <p><a href="http://docs.ckan.org/en/ckan-1.4.3/authorization.html" rel="nofollow noreferrer">http://docs.ckan.org/en/ckan-1.4.3/authorization.html</a></p>
  
  <p>to create users and assign roles to specifics package and the command <strong>right</strong> not working.</p>
  
  <p>For instance:</p>
  
  <pre><code>paster --plugin=ckan rights -c /etc/ckan/default/development.ini list
  </code></pre>
  
  <p>I get error:</p>
  
  <pre><code>Command 'rights' not known (you may need to run setup.py egg_info)
  Known commands:
    celeryd           Celery daemon [DEPRECATED]
    check-po-files    Check po files for common mistakes
    color             Create or remove a color scheme.
    config-tool       Tool for editing options in a CKAN config file
    create            Create the file layout for a Python distribution
    create-test-data  Create test data in the database.
    datapusher        Perform commands in the datapusher
    dataset           Manage datasets
    datastore         Perform commands to set up the datastore
    db                Perform various tasks on the database.
    exe               Run #! executable files
    front-end-build   Creates and minifies css and JavaScript files
    help              Display help
    jobs              Manage background jobs
    less              Compile all root less documents into their CSS counterparts
    make-config       Install a package and create a fresh config file/directory
    minify            Create minified versions of the given Javascript and CSS files.
    notify            Send out modification notifications.
    plugin-info       Provide info on installed plugins.
    points            Show information about entry points
    post              Run a request for the described application
    profile           Code speed profiler
    ratings           Manage the ratings stored in the db
    rdf-export        Export active datasets as RDF
    request           Run a request for the described application
    search-index      Creates a search index for all datasets
    serve             Serve the described application
    setup-app         Setup an application, given a config file
    sysadmin          Gives sysadmin rights to a named user
    tracking          Update tracking statistics
    trans             Translation helper functions
    user              Manage users
    views             Manage resource views.
  </code></pre>
  
  <p>but if I create a user like this:</p>
  
  <pre><code>paster sysadmin add seanh -c /etc/ckan/default/development.ini
  </code></pre>
  
  <p>works ok, so I don't think the problem was in my enviroment.</p>
  
  <p><strong>Note:</strong></p>
  
  <pre><code>Centos 7.4
  ckan 2.7.3
  </code></pre>
  
  <p>thanks</p>