R1:ec8162bcfc3d

fix broken DatabaseConfigurationProvider interface

Summary: broken by rPd27e7c52b21865563bd56f37d5d422515aa40bb7

Test Plan: sigh

Reviewers: epriestley, edward, levijackson

Reviewed By: epriestley

CC: Korvin, aran

Differential Revision: https://secure.phabricator.com/D6816