Error when adding a new feed

[AlexFaraino]

Request Type

Bug

Work Environment

Question	Answer
OS version (server)	Alpine 3.4
OS version (client)	Win10
Hippocampe version / git hash	f4d8807
Package Type	Docker
Browser type & version	N/A
Elasticsearch version	5.5

Problem Description

When adding a new feed and launching shadowbook, I got this error on the new feed: ["TransportError(400, u'illegal_argument_exception', u"Can't parse [index] value [not_analyzed] for field [source], expected [true] or [false]")"] from Elasticsearch.

Steps to Reproduce

1. Remove a feeds from the core/conf/feed directory
2. Launch Hippocampe for the first time, on a new index and launch shadowbook
3. Then, shutdown Hippocampe and restore the deleted feed
4. Launch Hippocampe and launch Shadowbook again
5. When shadowbook is finished, the new feed got the mentioned error

Possible Solutions

Looking at the Elasticsearch doc, index parameter should be True or False (false by default).
https://www.elastic.co/guide/en/elasticsearch/reference/5.6/keyword.html
In core/services/modules/shadowbook/objects/IndexIntel.py, index parameter for field "source" is "not_analyzed".