smb3: allow uid and gid owners to be set on create with idsfromsid mount option

Currently idsfromsid mount option allows querying owner information from the
special sids used to represent POSIX uids and gids but needed changes to
populate the security descriptor context with the owner information when
idsfromsid mount option was used.

Signed-off-by: Steve French <stfrench@microsoft.com>
Reviewed-by: Pavel Shilovsky <pshilov@microsoft.com>