Use the new date data members from VersioncontrolOperation

Actually, author_date and commiter_date fields in versioncontrol_operations table are not filled during "Fetch logs" operations on Git repository.
How to reproduce:
1) Add Git repository
2) Fetch logs for it
3) See versioncontrol_operations table
author_date and commiter_date fields are 0.
I guess problem line is 362 in versioncontrol_git.log

  // build the data array to be used for the commit op
  $op_data = array(
    'type' => VERSIONCONTROL_OPERATION_COMMIT,
    'revision' => $revision,
    'author' => $author_email,
    'author_name' => $author_name,
    'committer' => $committer_email,
    'committer_name' => $committer_name,
    'parent_commit' => reset($parents),
    'merge' => $merge,
    'date' => $date,
    'message' => $message,
    'repository' => $repository,
  );

and maybe it should be like

  // build the data array to be used for the commit op
  $op_data = array(
    'type' => VERSIONCONTROL_OPERATION_COMMIT,
    'revision' => $revision,
    'author' => $author_email,
    'author_name' => $author_name,
    'committer' => $committer_email,
    'committer_name' => $committer_name,
    'parent_commit' => reset($parents),
    'merge' => $merge,
    'author_date' => $date,
    'message' => $message,
    'repository' => $repository,
  );

Any suggestions about this?