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

.pre-commit-config.yaml

@@ -21,4 +21,4 @@ repos:
     rev: 'master' # Update me!
     hooks:
       - id: bandit
-        exclude: beat/editor/test
+        exclude: (beat/web/.*/tests|eggs/)