SWING-150 removed django_cms, drifter and vagrant

[felicemcc]

Hello, I found as well:

File: django-template/{{cookiecutter.project_slug}}/.gitignore

• Still references to drifter and vagrant

File: django-template/hooks/post_gen_project.py

• Please remove install_drifter() function

• Look for these lines and remove them:

  
  set_parameter(path, 'box_name', 'drifter/stretch64-base')
  set_parameter(path, 'box_url', 'https://vagrantbox-public.liip.ch/drifter-stretch64-base.json')

**File: django-template/{{cookiecutter.project_slug}}/setup.cfg**

- References to drifter

[danickfort]

looks good to me, I would merge the PR if I had permissions 😄 👍