Renomme correctement les modules social.* (#6556)

Une partie de la migration indiquée dans https://github.com/omab/python-social-auth/blob/master/MIGRATING_TO_SOCIAL.md n'a pas été faite : renommer tous les modules `social.*` en `social_core` ou `social_django`. Ça fonctionnait jusqu'à maintenant, car le paquet Python `social` était resté installé dans les environnements virtuels des serveurs de production et bêta, mais ça ne marche plus sur la bêta, puisqu'on est reparti d'un environnement vierge en le changeant...

Suppression au passage de configuration inutilement dupliquée.

Tant qu'à faire, mise à jour de social-auth-app-django.

Fix #6554

requirements.txt

@@ -1,7 +1,7 @@
 # Implicit dependencies (optional dependencies of dependencies)
 elasticsearch-dsl==5.4.0
 elasticsearch==5.5.3
-social-auth-app-django==5.3.0
+social-auth-app-django==5.4.0
 
 # Explicit dependencies (references in code)
 beautifulsoup4==4.12.2

zds/settings/abstract_base/requirements.py

@@ -15,17 +15,17 @@
 SOCIAL_AUTH_FACEBOOK_SCOPE = ["email"]
 
 SOCIAL_AUTH_PIPELINE = (
-    "social.pipeline.social_auth.social_details",
-    "social.pipeline.social_auth.social_uid",
-    "social.pipeline.social_auth.auth_allowed",
-    "social.pipeline.social_auth.social_user",
-    "social.pipeline.user.get_username",
-    "social.pipeline.social_auth.associate_by_email",
-    "social.pipeline.user.create_user",
+    "social_core.pipeline.social_auth.social_details",
+    "social_core.pipeline.social_auth.social_uid",
+    "social_core.pipeline.social_auth.auth_allowed",
+    "social_core.pipeline.social_auth.social_user",
+    "social_core.pipeline.user.get_username",
+    "social_core.pipeline.social_auth.associate_by_email",
+    "social_core.pipeline.user.create_user",
     "zds.member.models.save_profile",
-    "social.pipeline.social_auth.associate_user",
-    "social.pipeline.social_auth.load_extra_data",
-    "social.pipeline.user.user_details",
+    "social_core.pipeline.social_auth.associate_user",
+    "social_core.pipeline.social_auth.load_extra_data",
+    "social_core.pipeline.user.user_details",
 )
 
 # Before adding new providers such as Facebook and Google,

zds/settings/prod.py

@@ -122,23 +122,6 @@ def _get_version():
 }
 
 
-# python-social-auth
-# http://psa.matiasaguirre.net/docs/configuration/django.html
-SOCIAL_AUTH_PIPELINE = (
-    "social.pipeline.social_auth.social_details",
-    "social.pipeline.social_auth.social_uid",
-    "social.pipeline.social_auth.auth_allowed",
-    "social.pipeline.social_auth.social_user",
-    "social.pipeline.user.get_username",
-    "social.pipeline.social_auth.associate_by_email",
-    "social.pipeline.user.create_user",
-    "zds.member.models.save_profile",
-    "social.pipeline.social_auth.associate_user",
-    "social.pipeline.social_auth.load_extra_data",
-    "social.pipeline.user.user_details",
-)
-
-
 ###############################################################################
 # ZESTE DE SAVOIR SETTINGS