[Samba] samba 4 domain join to win 2008r2 level DC w/ a schema with exchange 2010 extensions: replication after the join is broken

[Zerwes, Klaus]

Just another note: due to the broken replication a regular demote fails.

# samba-tool domain demote -UAdministrator 
Desactivating inbound replication
Asking partner server w2k8r2.test.rls.ad to synchronize from us
Error while demoting, re-enabling inbound replication
ERROR(<class 'samba.drs_utils.drsException'>): Error while sending a DsReplicaSync for partion CN=Configuration,DC=test,DC=rls,DC=ad - drsException: DsReplicaSync failed (8418, 'WERR_DS_DRA_SCHEMA_MISMATCH')
  File "/usr/local/samba/lib/python2.7/site-packages/samba/netcmd/domain.py", line 650, in run
    sendDsReplicaSync(drsuapiBind, drsuapi_handle, ntds_guid, str(part), drsuapi.DRSUAPI_DRS_WRIT_REP)
  File "/usr/local/samba/lib/python2.7/site-packages/samba/drs_utils.py", line 83, in sendDsReplicaSync
    raise drsException("DsReplicaSync failed %s" % estr)

Klaus