[WIP] Add maason, a MAAS automation tool#1

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fnordahl wants to merge 4 commits intomasterfrom add-maason

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Commits on Nov 17, 2020

Commits on Dec 7, 2020

[WIP] Teach the clear storage config helper about LVM
fnordahl
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Commits on Jan 20, 2021

[wip] more wip wip wip
fnordahl
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