Adding config option to set the timeout for the Elastic request

[smoreau]

Description

The purpose of this change is to add a new configuration option to set the timeout when performing an Elastic request.
I needed it on my Elastic cluster when performing search on large amount of data.

Motivation and Context

As explained in the description, the motivation of this change is to allow us to set the timeout for the Elastic request. The default timeout is quite low.

How Has This Been Tested?

It has been successfully tested on our test Resilient environment.
We also did non-regression testing : if you do not add this option in the configuration file, it is still working as before.

Checklist:

• I have added a Signed-off-by
• Either no new documentation is required by this change, OR I added new documentation
• Either no new tests are required by this change, OR I added new tests
• I have run pep8 and pylint. I have cleaned up all valid errors and warnings in code I have added or modified. These tools may generate false positives. Don't be worried about ignoring some errors or warnings. The goal is clean, consistent, and readable code.

Signed-off-by: Stéphane Moreau smoreau@logikdev.com