Replace ExtendedAsyncResult by PgUtil in AuditDataImpl

ExtendedAsyncResult from okapi-common has been deleted: OKAPI-1078, OKAPI-810

A solution that much better works with Future is ErrorTypeException from okapi-common.

Okapi >= 5.0.0 will ship without ExtendedAsyncResult.

mod-audit uses ExtendedAsyncResult only in AuditDataImpl.

The code in AuditDataImpl can be replaced by the default code provided by RMB's PgUtil.

Task:

Replace ExtendedAsyncResult by ErrorTypeException, or replace AuditDataImpl code by PgUtil.