HSEARCH-2501 Elasticsearch calendar resolution handling is not consistent with Lucene's #1282
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https://hibernate.atlassian.net/browse/HSEARCH-2501
Please note that with Lucene, we always truncate date/calendars with the GMT timezone, regardless of the timezone that has been set on the calendar.
If we are to solve this issue, I think we should solve it in a way that is consistent between ES and Lucene. For instance we could add a configuration option to set the timezone to use when truncating dates ('GMT', '+01:00', 'default' for the JVM's default, ...) and another for calendars (same options + another to instruct to use the calendar's timezone).
See also the thread I started on the hibernate-dev mailing list: http://lists.jboss.org/pipermail/hibernate-dev/2017-January/015712.html
For now, I made the Elasticsearch integration behave the same as Lucene.