use our abort policy in the scheduler thread pool
upgrade to joda 2.3
Make sure all shards are refreshed during recovery test
Don't reduce twice if failure occurs.
Refactor term vector api

This is necessary to allow adding a mult term vector request
Multi term vector request
--------------------------

This feature allows to retrieve [term vectors](https://github.com/elasticsearch/elasticsearch/issues/3114) for a list of documents. The json request has exactly the same [format](https://github.com/elasticsearch/elasticsearch/issues/3484) as the ```_termvectors``` endpoint

It use it, call

```
curl -XGET 'http://localhost:9200/index/type/_mtermvectors' -d '{
    "fields": [
        "field1",
        "field2",
        ...
    ],
    "ids": [
        "docId1",
        "docId2",
        ...
    ],
    "offsets": false|true,
    "payloads": false|true,
    "positions": false|true,
    "term_statistics": false|true,
    "field_statistics": false|true
}'

```

The return format is an array, each entry of which conatins the term vector response for one document:

```
{
   "docs": [
      {
         "_index": "index",
         "_type": "type",
         "_id": "docId1",
         "_version": 1,
         "exists": true,
         "term_vectors": {
         	...
         }
      },
      {
         "_index": "index",
         "_type": "type",
         "_id": "docId2",
         "_version": 1,
         "exists": true,
         "term_vectors": {
         ...
         }
      }
   ]
}
```

Note that, like term vectors, the mult term vectors request will silenty skip over documents that have no term vectors stored in the index and will simply return an empty response in this case.

Closes #3536
Added extra logging
improve search while create test
- improve the test to be more re-creatable
- have tests for various number of replica counts, to check if failures are caused by searching on replicas that might not have been refreshed yet
- improve test to test explicit index creation, and index creation caused by index operation
- have an initial search go to _primary, to check if failure fails when searching on replica because it missed a refresh
Improve refresh logic when replica move to started
closes #3573
Only use the client variable and don't use client from client() in percolator test
Small cleanup
Added highlighter to percolate api.

The highlighter in the percolate api highlights snippets in the document being percolated. If highlighting is enabled then foreach matching query, highlight snippets will be generated.
All highlight options that are supported via the search api are also supported in the percolate api, since the percolate api embeds the same highlighter infrastructure as the search api.
The `size` option is a required option if highlighting is specified in the percolate api, other than that the `highlight`request part can just be placed in the percolate api request body.

Closes #3574
Rename multi percolate item actions:
count_percolate -> count
percolate_existing_doc -> percolate
count_percolate_existing_doc -> count

If header contains `id` field, then it will automatically be percolation  an existing document.
No test is simple