* Fix typo: _DEFALT_OP_NAME
* Extract ES document ID from URL, put in attributes
Elasticsearch creates URLs for index() and delete() before they hit
perform_request(). This means there would be many unique span names
containing unique document IDs, of the form
'Elasticsearch/indexname/_doc/documentid'.
This extracts the document ID from the URL and replaces it with ':id',
then puts it in the span's attributes.
* Add TODO comment with link to issue
* Add CHANGELOG entry
* Don't use custom doc types, deprecated in ES 7
* Update tests to match instrumentation
1b75672e73