Merge "Init HostState.failed_builds" into stable/stein

Author: Zuul

nova/scheduler/host_manager.py

@@ -126,6 +126,7 @@ def __init__(self, host, node, cell_uuid):
         # Additional host information from the compute node stats:
         self.num_instances = 0
         self.num_io_ops = 0
+        self.failed_builds = 0
 
         # Other information
         self.host_ip = None

nova/tests/unit/scheduler/test_host_manager.py

@@ -1455,3 +1455,5 @@ def test_stat_consumption_from_compute_node_not_ready(self):
         # Because compute record not ready, the update of free ram
         # will not happen and the value will still be 0
         self.assertEqual(0, host.free_ram_mb)
+        # same with failed_builds
+        self.assertEqual(0, host.failed_builds)