Merge branch '51-migration-en-django-2-x' into 'rp2'

Resolve "Migration en django 2.X"

Closes #51

See merge request !48
2 jobs for 52-lorsqu-un-article-est-cree-une-nouvelle-fois-s-il-contient-des-tags-les-anciens-tags-sont-ecrases in 3 minutes and 49 seconds (queued for 31 seconds)
Status Name Job ID Coverage
  Test
passed unit tests #5005
preprod

00:01:47

84.0%
 
  Build
passed static build #5006
preprod

00:02:01