Feature: Support old database versions: 8, 9, 10, 11.1

[bersler]

Is your feature request related to a problem? Please describe.
Support old Oracle database versions like 8, 9, 10, 11.1

Describe the solution you'd like
Add ability for OpenLogReplicator to parse redo log produced by ancient Oracle databases.

Describe alternatives you've considered
Upgrade the database to at least 11.2 and run replication.

Additional context
Ancient Oracle databases have very complex and redo log format. Code wich works with version 11.2 will not be able to work with older versions. It requires much work.
On the other hand old versions are very very seldom used and for a few database instances it makes not much sense to put a lot of effort in software development.

[bersler]

This feature is complicated to implement.. If there is a demand from users more focus could be given here.