One more fix for friendly_machine_model
One more fix for friendly_machine_model

Change "if output is None" check to "if not output" so that clearing the machine_model_friendly field will trigger a new look up (an empty string is not None, but both an empty string and None are "falsey")
sheagcraig/sal,salopensource/sal,salopensource/sal,erikng/sal,erikng/sal,erikng/sal,erikng/sal,sheagcraig/sal,sheagcraig/sal,salopensource/sal,salopensource/sal,sheagcraig/sal