Resolve "Add possibility of querying annotations of datafiles"

Closes #118 (closed)

ajoute recherche "key-value pairs"

secure/datafiles/list/json/lookup/str:key/str:value/

secure/datafiles/list/json/lookup/str:key/str:value/str:DatasetID/

Recherche est exact (recherche exacte de la clé avec la valeur)

portal/views/secure/datafile.py

@@ -561,5 +561,4 @@ class DataFileHasAnnotJSONListView(DataFileLookupJSONListView):
                 datasets__iric_data_id=dataset
             )
 
-
         return qs.distinct()