Tidy up the placement charm#154

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nobuto-m wants to merge 5 commits intoopenstack-charmers:masterfrom

nobuto-m:placement-charm-follow-up

Commits on Mar 9, 2020

Tidy up the placement charm
nobuto-m
committed

Commits on Mar 27, 2020

Merge branch 'master' into placement-charm-follow-up
nobuto-m
authored

Commits on Feb 1, 2021

Merge branch 'master' into placement-charm-follow-up
Aurelien Lourot
committed
Fix merge conflict
Aurelien Lourot
committed
Revert unneeded/wrong changes
Aurelien Lourot
committed