[bug 1055520] Update to ElasticUtils v0.10

This updates elasticutils to v0.10 which should work with both
Elasticsearch 0.90 and 1.0.
Merge pull request #330 from willkg/elasticutils-update

[bug 1055520] Update to ElasticUtils v0.10
[bug 1055520] Fix two reshape issues post EU 0.10 update

* MLT returns results that have values which are arrays--so we need
  to reshape those
* the spam duplicates report uses .values_dict() and we need to
  reshape those