Draft shouldn't update Launchpad before being Published

Hmm, unfortunately Gerrit calls its hooks just the same in draft and no-draft cases. I'm researching options on how to fix that.

This might be obvious, but in case it's handled in different places: this also applies to blueprints, which will be uploaded with the gerrit topic even if the review is a draft.

When the patchset-created hook is invoked by Gerrit, there is no flag stating the patchset is in draft.

This can be done by querying the database and checking if the patchset is indeed a draft within update_bug.py, which is the script called by the hook.
The table for patchsets contain the desired flag:

mysql> describe patch_sets;
+---------------------+-------------+------+-----+-------------------+-----------------------------+
| Field | Type | Null | Key | Default | Extra |
+---------------------+-------------+------+-----+-------------------+-----------------------------+
| revision | varchar(40) | YES | | NULL | |
| uploader_account_id | int(11) | NO | | 0 | |
| created_on | timestamp | NO | | CURRENT_TIMESTAMP | on update CURRENT_TIMESTAMP |
| draft | char(1) | NO | | N | |
| change_id | int(11) | NO | PRI | 0 | |
| patch_set_id | int(11) | NO | PRI | 0 | |
+---------------------+-------------+------+-----+-------------------+-----------------------------+
6 rows in set (0.01 sec)

Draft reviews are being disabled the 30th May, unassigning myself and flagging this as INVALID