[petition] return ID of existing active commissioner if one exists#36

Merged

jwhui merged 4 commits intoopenthread:masterfrom wgtdkp:fix-petition

Mar 18, 2020

+74-31

Commits on Mar 14, 2020

[petition] returns its ID if there is already an active commissioner
wgtdkp
committed

Commits on Mar 16, 2020

make pretty
wgtdkp
committed

Commits on Mar 18, 2020