LocalDateTime regression

[ps-feng]

It seems that the fixes for #991 and #998 have changed the precision of the date time stored in the DB and only milliseconds are stored now in a DATETIME MySQL column. For example:

Before (in 0.26.1)
2020-08-06 12:35:03.172357

After (in 0.26.2)
2020-08-06 12:35:03.172000

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Environment

• OpenJDK 64-Bit Server VM (build 10.0.2-adoptopenjdk+13, mixed mode)
• MySQL 5.7.26