Added more explicit logging for method dispatch to run a particular intervention

taar/recommenders/recommendation_manager.py

@@ -141,8 +141,11 @@ class RecommendationManager:
 
         # Select recommendation output based on extra_data['branch']
         branch_selector = extra_data.get('branch', INTERVENTION_CONTROL)
-
         method_selector = branch_selector.replace('-', '_')
+
+        method_name = 'recommend_{}'.format(method_selector)
+
+        self.logger.info("Dispatching to method [{}]".format(method_name))
         branch_method = getattr(self, 'recommend_%s' % method_selector)
         return branch_method(client_info, client_id, limit, extra_data)