update bw to 4.3, add .provides() to metadata reactors

bundles/smartd/metadata.py

@@ -16,7 +16,9 @@ defaults = {
 }
 
 
-@metadata_reactor
+@metadata_reactor.provides(
+    'smartd/disks',
+)
 def zfs_disks_to_metadata(metadata):
     disks = set()
 
@@ -35,7 +37,9 @@ def zfs_disks_to_metadata(metadata):
     }
 
 
-@metadata_reactor
+@metadata_reactor.provides(
+    'icinga2_api/smartd/services',
+)
 def icinga(metadata):
     services = {}