Black list and White list for python modules required to be in try/except block

[UtahDave]

It would be very useful to have a lint plugin to manage a black list and a white list of python modules that must be in a try/except block.

Black list example:
The pwd modules doesn't exist on Windows and so should be in a try/except block so it doesn't blow up the windows minion

White list example:
@s0undt3ch suggested we make all non-stdlib and non salt hard dep modules be required to be in a try/except block as well.
If we wanted to allow a module that's not stdlib or non salt hard dep be imported outside a try/except block, then we'd add it to the white list.

@s0undt3ch or @thatch45 do you have any thoughts or suggestions for this?

[s0undt3ch]

X-Ref: saltstack/salt-pylint#1