More Like This Query: replaced 'exclude' with 'include' to avoid double negation when set.

Closes #6248
Aggregations: Fixed conversion of date field values when using multiple date formats

When multiple date formats are specified using the || syntax in the field mappings the date_histogram aggregation breaks.  This is because we are getting a parser rather than a printer from the date formatter for the object we use to convert the DateTime values back into Strings.  Simple fix to get the printer form the date format and test to back it up