Don't fail hard on missing traits

Author: JohnGarbutt

blazar/plugins/flavor/flavor_plugin.py

@@ -118,9 +118,11 @@ def _query_available_hosts(self, start_date, end_date,
         # we should be able to exclude hosts that don't match the
         # resource requests, e.g. baremetal vs virtual
         # or missing traits
-        if resource_traits:
-            raise mgr_exceptions.NotImplemented(
-                error="Resource traits not supported yet")
+        # TODO(johngarbutt) explore supporting custom traits
+        # used to group hosts, e.g. for different types of hardware
+        # if resource_traits:
+        #    raise mgr_exceptions.NotImplemented(
+        #        error="Resource traits not supported yet")
         hosts = db_api.reservable_host_get_all_by_queries([])
 
         # find reservations for each host in our time period