Unable to setup elasticsearch using `configure.py` on Ubuntu

[raghavmittal101]

Issue Description

downloadES function of PreProcessing class downloads Windows's version of Elasticsearch which is invalid for Linux.

How to reproduce / Current behavior

I have edited the configure.py to avoid elasticsearch installation on linux and let the user manually setup elasticsearch. You can use the older version of configure.py for reproduction.

Run configure.py on Linux machine.
It will endup with an error Permission denied. Take a look at extracted folder of elasticsearch setup. You will find .exe files there.

Expected behavior

It should download Linux version of zip file. And should be able to install it.

Suggestions

Go to https://www.elastic.co/downloads/elasticsearch from different environments. You will find that the link for zip don't change but the zip-file downloaded corresponds to machine's environment.

[raghavmittal101]

Just found out that downloaded zip contains support for both Windows and Linux.
To run elastic search, it should be called as bin/elasticsearch. But on my machine this is working for ver5.3.0 only.