Update labels on nested operation entity inserts/updates

This fix broke the build. There's some improper detection happening somewhere, as we now see this lovely output quite a bit while parsing in d.o repos, and we only have ~18000 labels instead of the expected ~44000. Plus, it leaves all repositories locked - fail all around.

WD php: PDOException: SQLSTATE[23000]: Integrity constraint violation: 1062 Duplicate entry '1535594-94839' for key 'PRIMARY': INSERT INTO {versioncontrol_operation_labels} (vc_op_id, label_id,     [error]
action) VALUES (:db_insert_placeholder_0, :db_insert_placeholder_1, :db_insert_placeholder_2), (:db_insert_placeholder_3, :db_insert_placeholder_4, :db_insert_placeholder_5),
(:db_insert_placeholder_6, :db_insert_placeholder_7, :db_insert_placeholder_8), (:db_insert_placeholder_9, :db_insert_placeholder_10, :db_insert_placeholder_11), (:db_insert_placeholder_12,
:db_insert_placeholder_13, :db_insert_placeholder_14), (:db_insert_placeholder_15, :db_insert_placeholder_16, :db_insert_placeholder_17); Array
(
    [:db_insert_placeholder_0] => 1535594
    [:db_insert_placeholder_1] => 94839
    [:db_insert_placeholder_2] => 2
    [:db_insert_placeholder_3] => 1535594
    [:db_insert_placeholder_4] => 94844
    [:db_insert_placeholder_5] => 2
    [:db_insert_placeholder_6] => 1535594
    [:db_insert_placeholder_7] => 94849
    [:db_insert_placeholder_8] => 2
    [:db_insert_placeholder_9] => 1535594
    [:db_insert_placeholder_10] => 94854
    [:db_insert_placeholder_11] => 2
    [:db_insert_placeholder_12] => 1535594
    [:db_insert_placeholder_13] => 94859
    [:db_insert_placeholder_14] => 2
    [:db_insert_placeholder_15] => 1535594
    [:db_insert_placeholder_16] => 94839
    [:db_insert_placeholder_17] => 2
)
 in VersioncontrolOperation->updateLabels() (line 275 of /home/sdboyer/gd/sites/all/modules/versioncontrol/includes/VersioncontrolOperation.php).

Looking at that output it seems like it ought to be dead-simple to fix, but I have other work to focus on - please take care of the problem ASAP?

Yup, with the other ones, this outta be fine now. Local tests make it look like it is.