Add LCM plugin config. Fix 'infoblox_import_subnets` setting.

[progala]

Updates to dev nautobot_config.py:

• Adds config for Nautobot Device Lifecycle Management plugin.
• Fixes logic in infoblox_import_subnets setting.

[jdrew82]

So I'm a bit confused here. You're creating a list it looks like, but shouldn't that automatically be done if the value is a concatenated string with the split()?

[progala]

Problem here is that the default value "" will result in "".split(","). This does not produce an empty list which breaks logic in https://github.com/nautobot/nautobot-app-ssot/blob/develop/nautobot_ssot/integrations/infoblox/diffsync/adapters/infoblox.py#L51

>>> "".split(",")
['']

[jdrew82]

And you've got the same result with your suggestion:

>>> [x for x in "".split(",") if x]
[]

[progala]

It's not the same. One is a 1-element list with an empty string [''], the other is a 0-element list []. bool(['']) evaluates to True, bool([]) evaluates to False.

[jdrew82]

Fair point. Looks like it should work right with a passed string as typically expected too so I'm fine with merging this. Can we also get the documentation updated to match?

[jdrew82]

LGTM!