R1:d6b882a804c7

Fix visiblity of `LiskDAO::getConfiguration()`

Summary: Ref T6822.

Test Plan: `grep`

Reviewers: epriestley, #blessed_reviewers

Reviewed By: epriestley, #blessed_reviewers

Subscribers: hach-que, Korvin, epriestley

Maniphest Tasks: T6822

Differential Revision: https://secure.phabricator.com/D11370