Remove blameRevision and revertPlan from the DifferentialRevision schema

Summary:
These fields use auxiliary storage now. Migrate the data and get rid of the
columns in the main table.

  - This might take a little while to run, although there are <500k rows so
probably not too long.
  - Maybe grab a backup of the table first, if I screwed something up this will
delete the data in these fields.

Test Plan:
  - Ran migration locally.
  - Browsed Differential.
  - Grepped for "revertPlan" and "blameRevision".

Reviewers: jungejason, tuomaspelkonen, aran

Reviewed By: jungejason

CC: aran, jungejason, epriestley

Differential Revision: 832

resources/sql/patches/072.blamerevert.sql

@@ -0,0 +1,20 @@
+INSERT INTO phabricator_differential.differential_auxiliaryfield
+  (revisionPHID, name, value, dateCreated, dateModified)
+SELECT phid, 'phabricator:blame-revision', blameRevision,
+    dateCreated, dateModified
+  FROM phabricator_differential.differential_revision
+  WHERE blameRevision != '';
+
+ALTER TABLE phabricator_differential.differential_revision
+  DROP blameRevision;
+
+
+INSERT INTO phabricator_differential.differential_auxiliaryfield
+  (revisionPHID, name, value, dateCreated, dateModified)
+SELECT phid, 'phabricator:revert-plan', revertPlan,
+    dateCreated, dateModified
+  FROM phabricator_differential.differential_revision
+  WHERE revertPlan != '';
+
+ALTER TABLE phabricator_differential.differential_revision
+  DROP revertPlan;

src/applications/conduit/method/differential/getrevision/ConduitAPI_differential_getrevision_Method.php

@@ -91,8 +91,6 @@ class ConduitAPI_differential_getrevision_Method extends ConduitAPIMethod {
         $revision->getStatus()),
       'summary' => $revision->getSummary(),
       'testPlan' => $revision->getTestPlan(),
-      'revertPlan' => $revision->getRevertPlan(),
-      'blameRevision' => $revision->getBlameRevision(),
       'lineCount' => $revision->getLineCount(),
       'reviewerPHIDs' => $reviewer_phids,
       'diffs' => $diff_dicts,

src/applications/differential/editor/revision/DifferentialRevisionEditor.php

@@ -175,12 +175,6 @@ class DifferentialRevisionEditor {
       if ($revision->getAuthorPHID() === null) {
         $revision->setAuthorPHID($this->getActorPHID());
       }
-      if ($revision->getRevertPlan() === null) {
-        $revision->setRevertPlan('');
-      }
-      if ($revision->getBlameRevision() === null) {
-        $revision->setBlameRevision('');
-      }
       if ($revision->getSummary() === null) {
         $revision->setSummary('');
       }

src/applications/differential/storage/revision/DifferentialRevision.php

@@ -23,8 +23,6 @@ class DifferentialRevision extends DifferentialDAO {
 
   protected $summary;
   protected $testPlan;
-  protected $revertPlan;
-  protected $blameRevision;
 
   protected $phid;
   protected $authorPHID;