Refactor update creation api

This merge request does the following:

• Raise DRF errors rather than returning response to take advantage of the DRF exception handling mechanism
• Create serialisers for PUT request to simplify the code
• Improve validation checks in several places
• Fixes several issues in DRF infrastructure uses
• Fixes JSON fields handling
• Remove routes that do no fully qualify objects
• Implement a custom DRF exception handler that will allow to log errors
• Improve testing
• Improve permission management

beat/web/common/serializers.py

@@ -364,7 +364,7 @@ class ContributionModSerializer(serializers.ModelSerializer):
 
 
 class ContributionCreationSerializer(ContributionModSerializer):
-    fork_of = serializers.JSONField(required=False)
+    fork_of = serializers.CharField(required=False)
     previous_version = serializers.CharField(required=False)
     version = serializers.IntegerField(min_value=1)