Summary: Sql Patch to rename the externalaccount table to user_externalaccount and to add dateCreated, dateModified fields to the updated table.
Test Plan: {F41442}
Reviewers: epriestley
Reviewed By: epriestley
CC: aran, Korvin, AnhNhan
Differential Revision: https://secure.phabricator.com/D5770
