[plotters][serializers] Add missing context on serializer creation

The FullPlotterSerializer created within FullPlotterParameterSerializer
was not getting any context so it could not perform proper checks
regarding the user that made the request.

beat/web/plotters/serializers.py

@@ -226,7 +226,7 @@ class FullPlotterParameterSerializer(PlotterParameterAllSerializer):
         serializer = FullPlotterSerializer
         results = {}
         for plotter in all_plotters.iterator():
-            serializer = FullPlotterSerializer(plotter, fields=['id', 'accessibility', 'modifiable', 'deletable', 'is_owner', 'name', 'fork_of', 'last_version', 'previous_version', 'short_description', 'description', 'version', 'creation_date', 'data', 'sample_data', 'declaration'])
+            serializer = FullPlotterSerializer(plotter, context=self.context, fields=['id', 'accessibility', 'modifiable', 'deletable', 'is_owner', 'name', 'fork_of', 'last_version', 'previous_version', 'short_description', 'description', 'version', 'creation_date', 'data', 'sample_data', 'declaration'])
             results[plotter.fullname()] = serializer.data
 
         return results