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/plotters/serializers.py

@@ -25,23 +25,26 @@
 #                                                                             #
 ###############################################################################
 
+
+import simplejson as json
+
+import beat.core.plotter
+import beat.core.plotterparameter
+
+from django.utils.encoding import smart_text
+from rest_framework import serializers
+
+from ..common import fields as beat_fields
 from ..common.serializers import (
     DynamicFieldsSerializer,
     ContributionSerializer,
     ContributionCreationSerializer,
 )
-from .models import Plotter, PlotterParameter, DefaultPlotter
-from rest_framework import serializers
 
 from ..code.serializers import CodeSerializer, CodeCreationSerializer
 from ..libraries.serializers import LibraryReferenceSerializer
 
-from django.utils.encoding import smart_text
-
-import beat.core.plotter
-import beat.core.plotterparameter
-
-import simplejson as json
+from .models import Plotter, PlotterParameter, DefaultPlotter
 
 
 class PlotterSerializer(ContributionSerializer):
@@ -134,7 +137,7 @@ class PlotterParameterCreationFailedException(Exception):
 
 
 class PlotterParameterCreationSerializer(ContributionCreationSerializer):
-    data = serializers.JSONField(required=False)
+    data = beat_fields.JSONField(required=False)
 
     class Meta(ContributionCreationSerializer.Meta):
         model = PlotterParameter