Persistng commitDate with milliseconds precision on MySql

[bartoszwalacik]

related PR to poly - polyjdbc/polyjdbc#38
reasons, see #657

[bartoszwalacik]

@gbondarchuk9 we need to wait a while for the poly release

[bartoszwalacik]

col type is changed to timestamp(3) but MySql still writes without millis (see the test added in the last commit)
@gbondarchuk9, any ideas what's wrong?

[gbondarchuk9]

@bartoszwalacik I cannot find the test you're talking about, could you please refer with direct link to code?

by the way, I don't see any lines of code related to altering table with timestamp(3)

[bartoszwalacik]

@gbondarchuk9 links are here, look up, just above my previous comment

[bartoszwalacik]

fix released in 3.9.3