adds log message to get_collection

ckanext/odsh/collection/helpers.py

 from string import lower
 from operator import itemgetter
+import logging
 
 import ckan.lib.helpers as helpers
 import ckan.model as model
 import ckan.plugins.toolkit as toolkit
 
+log = logging.getLogger(__name__)
+
 
 def get_collection(dataset_dict):
+    log.debug('start of get_collection')
     collection_id = get_collection_id(dataset_dict)
     if collection_id:
         return get_collection_info(collection_id, dataset_dict)