Gitlab: Unblock an user blocked with state ldap_blocked

When an user blocked with state ldap_blocked, we can’t unblock it from admin panel

Fix:

$ su - postgres
$ psql
postgres@gitlab:~$ psql
psql (12.6 (Ubuntu 12.6-1.pgdg18.04+1))
Type "help" for help.

postgres=# \c gitlabhq_production

gitlabhq_production=# select state from public.users where username='user1';
    state
--------------
 ldap_blocked
(1 row)

gitlabhq_production=# update public.users set state='active' where username='user1';
UPDATE 1

gitlabhq_production=# select state from public.users where username='user1';
    state
--------------
 active
(1 row)