SQLEntrys should be sorted by their timestamp

There's no guarantee that events are inserted into the events-log
plugin's database in the same order as the events were created by
gerrit. Hence always sort them by the event creation timestamp which is
the same order SQL queries created by SQLQueryMaker are using.

Change-Id: Ia44b11049b7c09adc9610971c5a8cecd1fd0b05e
3 files changed