R1:2f043b253012

Fix visibility of `PhabricatorLiskDAO::establishLiveConnection` method

Summary: Ref T6822.

Test Plan: `grep`. This method is only called from within `LiskDAO::establishConnection()`.

Reviewers: #blessed_reviewers, epriestley

Reviewed By: #blessed_reviewers, epriestley

Subscribers: Korvin, epriestley

Maniphest Tasks: T6822

Differential Revision: https://secure.phabricator.com/D11412