Load a schema from the given file into the SamDB

def load_schema(ldif_file):
    """
    Load a schema from the given file into the SamDB
    """
    samdb = samdb_connect()
    dn = samdb.domain_dn()

    samdb.transaction_start()
    try:
        setup_add_ldif(samdb, ldif_file, {
            "DOMAINDN": dn,
        })
    except:
        samdb.transaction_cancel()
        raise

    samdb.transaction_commit()