Tanguy Leroux be96278c95 Add parsing method for ElasticsearchException.generateThrowableXContent() (#22783)
The output of the ElasticsearchException.generateThrowableXContent() method can be parsed back by the ElasticsearchException.fromXContent() method.

This commit adds unit tests in the style of the to-and-from-xcontent tests we already have for other parsing methods. It also relax the strict parsing of the ElasticsearchException.fromXContent() so that it does not throw an exception when custom metadata and headers are parsed, as long as they are either strings or arrays of strings. Every other type is ignored at parsing time.
2017-01-26 15:17:07 +01:00
..
2017-01-21 04:48:01 +01:00