[bug 1055520] Update to ElasticUtils v0.10

This updates elasticutils to v0.10 which should work with both
Elasticsearch 0.90 and 1.0.

r?
`opinions_s` is the result of an `S().values_list('id')` kind of thing. The result of that changes in ElasticUtils v0.10 to a list of tuples with a list with an id in it.

In other words, in ElasticUtils 0.90 we got back:

```
[(101,), (102,), (103,), ...]
```

And in ElasticUtils v0.10 we get back:

```
[([101],), ([102],), ([103],), ...]
```