Fix the Vagrant setup
    
    The Vagrant setup had a few issues:
    
    * the services are now correctly enabled when provisioning (Fixes #2647)
    * installed missing deps on trollius and trollius-redis (Fixes #2749)
    * fixed pagure_webhook.service to run against the right python file
    (Fixes #2749)
    * removed the --autoreload flag from the celery command in
    pagure_worker.service, as celery removed this flag (Fixes #2749)
    
    Signed-off-by: Ryan Lerch <rlerch@redhat.com>