[Samba] Windows 2019 DC and samba dc

[Шигапов Денис Вильданович]

I joined the windows 2019 domain, where among the controllers there is a 
Samba DC version 4.8.5, and after that the replica stopped working 
windows servers <--> samba DC. Upgrading to version 4.9.4 did not help

Errors:

```

фев 12 14:15:28 srv-dc01 samba[24637]: [2019/02/12 14:15:28.679872,  0] 
../source4/dsdb/repl/replicated_objects.c:248(dsdb_repl_resolve_working_schema)
фев 12 14:15:28 srv-dc01 samba[24637]:   Can't continue Schema load: 
didn't manage to convert any objects: all 1 remaining of 133 objects 
failed to convert
фев 12 14:15:28 srv-dc01 samba[24637]: [2019/02/12 14:15:28.680036,  0] 
../source4/dsdb/repl/replicated_objects.c:361(dsdb_repl_make_working_schema)
фев 12 14:15:28 srv-dc01 samba[24637]: 
../source4/dsdb/repl/replicated_objects.c:361: 
dsdb_repl_resolve_working_schema() failed: WERR_INTERNAL_ERRORFailed to 
create working schema: WERR_INTERNAL_ERROR

```