Merge ~cjwatson/launchpad:fix-delete-related-access-tokens into launchpad:master

[Colin Watson]

Grant garbo access to delete from AccessToken

Fixes test failure caused by https://code.launchpad.net/~cjwatson/launchpad/+git/launchpad/+merge/416820.

[Jürgen Gmach (jugmac00)]

review: Approve

diff --git a/database/schema/security.cfg b/database/schema/security.cfg
index 69dfec9..ada34e5 100644
--- a/database/schema/security.cfg
+++ b/database/schema/security.cfg
@@ -2472,6 +2472,7 @@ public.accessartifactgrant              = SELECT, DELETE
 public.accesspolicy                     = SELECT, DELETE
 public.accesspolicyartifact             = SELECT, DELETE
 public.accesspolicygrant                = SELECT, DELETE
+public.accesstoken                      = SELECT, DELETE
 public.account                          = SELECT, DELETE
 public.answercontact                    = SELECT, DELETE
 public.archiveauthtoken                 = SELECT, UPDATE