Change white list to allow list

[brosenberg42]

Issues:

• Change all references to "whitelist" to "allow list" and "blacklist" to "block list" openmpf#1705

Related PRs:

• Change white and black list to allow and deny list openmpf#1714
• Change whitelist to allow list. openmpf.github.io#172

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This change is 

[jrobble]

Reviewed 14 of 17 files at r1, 3 of 3 files at r2, all commit messages.
Reviewable status: complete! all files reviewed, all discussions resolved (waiting on @brosenberg42)