s4 upgradeprovision: Use replPropertyMetaData for better guess

s4 upgradeprovision: Use replPropertyMetaData for better guess

Rework upgradeprovision in order to get more precise updates when doing upgrade provision.
This is done through the use of replPropertyMetaData information and raw information revealed by the
"reveal" control.
The code has been changed also to avoid double free error when changing the schema (for old provision).
Checking of SD is done a bit more cleverly as we compare the different parts for an ACL separately.
Fix logic when upgrading provision without replPropertyMetaData infos
Also for old provision (pre alpha9) do not copy the usn range because data here will be wrong

Signed-off-by: Jelmer Vernooij <jelmer@samba.org>