At least in SqlPersistenceEngine, commit stamps are only saving with datetime precision, even though DB field is datetime2

[kblooie]

From @snissim on March 16, 2015 23:58

The CommitStamp parameter needs to be added to the command explicitly with DbType.DateTime2. I will create a PR.

Here's a before and after:

Copied from original issue: NEventStore/NEventStore#399