Remove on-object mailkeys from Phriction

Summary: Depends on D19619. Ref T13065. Ref T13077. Migrate Phriction mail keys to the new infrastructure and drop the column.

Test Plan: Ran migrations, spot-checked the database.

Reviewers: amckinley

Subscribers: PHID-OPKG-gm6ozazyms6q6i22gyam

Maniphest Tasks: T13077, T13065

Differential Revision: https://secure.phabricator.com/D19620

resources/sql/autopatches/20180829.phriction.01.mailkey.php

@@ -0,0 +1,26 @@
+<?php
+
+$document_table = new PhrictionDocument();
+$document_conn = $document_table->establishConnection('w');
+$document_name = $document_table->getTableName();
+
+$properties_table = new PhabricatorMetaMTAMailProperties();
+$conn = $properties_table->establishConnection('w');
+
+$iterator = new LiskRawMigrationIterator($document_conn, $document_name);
+foreach ($iterator as $row) {
+  queryfx(
+    $conn,
+    'INSERT IGNORE INTO %T
+        (objectPHID, mailProperties, dateCreated, dateModified)
+      VALUES
+        (%s, %s, %d, %d)',
+    $properties_table->getTableName(),
+    $row['phid'],
+    phutil_json_encode(
+      array(
+        'mailKey' => $row['mailKey'],
+      )),
+    PhabricatorTime::getNow(),
+    PhabricatorTime::getNow());
+}

resources/sql/autopatches/20180829.phriction.02.rmkey.sql

@@ -0,0 +1,2 @@
+ALTER TABLE {$NAMESPACE}_phriction.phriction_document
+  DROP mailKey;