Try thick connection first and use thin as fallback (similar approach as SQLcl)

[pesse]

This relates to #90
We should try connecting through thick (jdbc:oracle:oci8:) first and use thin (jdbc:oracle:thin:) as fallback.

[SebGt]

Hello, Do you have an idea of when this will be tried ?

Thanks

[pesse]

I can probably poke at it today evening. My concern is that it will introduce more complexity, it will also be hard to test via automated testing.