Fix missing import

The smm change omitted a required import.

confluent_server/confluent/discovery/handlers/smm.py

@@ -14,6 +14,7 @@
 
 import confluent.discovery.handlers.bmc as bmchandler
 import confluent.exceptions as exc
+import eventlet
 webclient = eventlet.import_patched('pyghmi.util.webclient')
 import struct
 import urllib