Changed Elasticsearch analyzer, Added Dockerfile

[5hirish]

Description

The major change is this PR is discussed in Issue #20

Types of change

• Custom English analyzer adam_analyzer in Elasticsearch
• Analyzer uses Porter2 Stemmer
• Added Dockerfile to build docker image
• Added function to collect system info

Checklist

• [x] I ran the tests, and all new and existing tests passed.
• [x] My changes don't require a change to the documentation, or if they do, I've added all required information.

Note: Reindexing is required after this pull request due to the changes in the analyzer on some fields.

[codecov[bot]]

Codecov Report

Merging #26 into master will decrease coverage by 0.26%. The diff coverage is 27.77%.

@@            Coverage Diff             @@
##           master      #26      +/-   ##
==========================================
- Coverage   40.53%   40.26%   -0.27%     
==========================================
  Files          26       27       +1     
  Lines        1394     1423      +29     
  Branches      195      196       +1     
==========================================
+ Hits          565      573       +8     
- Misses        799      821      +22     
+ Partials       30       29       -1

Impacted Files	Coverage Δ
qas/sys_info.py	0% <0%> (ø)
qas/adam.py	0% <0%> (ø)	:arrow_up:
qas/esstore/es_config.py	100% <100%> (ø)	:arrow_up:
qas/esstore/es_operate.py	34.9% <33.33%> (-0.05%)	:arrow_down:
qas/esstore/es_connect.py	60.65% <38.09%> (-5.31%)	:arrow_down:

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