Summary:
Tests doesn't require mysql since it uses fileindexapi.
Let's move sqlindexapi and fileindexapi to different files and include
only necessary file.
Test Plan: Run test-infinitepush-*
Reviewers: durham, simonfar, quark
Reviewed By: quark
Subscribers: mjpieters, #sourcecontrol
Differential Revision: https://phabricator.intern.facebook.com/D4029460
Tasks: 12479677
Signature: t1:4029460:1476709161:556f80605db9bd3c18dce1e16e996b13bbe96229
