Update PhabricatorRepositoryManagementLookupUsersWorkflow to use ConduitCall

Summary:
Ref T2783.

This updates PhabricatorRepositoryManagementLookupUsersWorkflow to use ConduitCall to retrieve information about the commit.

Test Plan:
Ran `bin/repository lookup-users rTESTe9683b64d3283f0b2d355fdbf231bc918b5ac0ab --trace` and saw the information returned (by making a request to `diffusion.querycommits` as the omnipotent user, signed with the device key).

Mucked with `cluster.addresses` and saw requests rejected.

Reviewers: hach-que, btrahan

Reviewed By: btrahan

Subscribers: Krenair, epriestley, Korvin

Maniphest Tasks: T2783

Differential Revision: https://secure.phabricator.com/D10403

src/applications/diffusion/data/DiffusionCommitRef.php

@@ -9,6 +9,26 @@ final class DiffusionCommitRef extends Phobject {
   private $committerEmail;
   private $hashes = array();
 
+  public static function newFromConduitResult(array $result) {
+    $ref = id(new DiffusionCommitRef())
+      ->setCommitterEmail(idx($result, 'committerEmail'))
+      ->setCommitterName(idx($result, 'committerName'))
+      ->setAuthorEmail(idx($result, 'authorEmail'))
+      ->setAuthorName(idx($result, 'authorName'))
+      ->setMessage(idx($result, 'message'));
+
+    $hashes = array();
+    foreach (idx($result, 'hashes', array()) as $hash_result) {
+      $hashes[] = id(new DiffusionCommitHash())
+        ->setHashType(idx($hash_result, 'type'))
+        ->setHashValue(idx($hash_result, 'value'));
+    }
+
+    $ref->setHashes($hashes);
+
+    return $ref;
+  }
+
   public function setHashes(array $hashes) {
     $this->hashes = $hashes;
     return $this;