Add elasticsearch container

[nivm]

Add an implementation of the elasticsearch container.

[pep8speaks]

Hello @nivm! Thanks for updating the PR.

• In the file testcontainers/elasticsearch.py, following are the PEP8 issues :

Line 28:80: E501 line too long (83 > 79 characters)

Comment last updated on May 04, 2018 at 06:51 Hours UTC

[codecov]

Codecov Report

Merging #19 into master will decrease coverage by 5.19%.
The diff coverage is 0%.

@@           Coverage Diff            @@
##           master     #19     +/-   ##
========================================
- Coverage   82.69%   77.5%   -5.2%     
========================================
  Files          13      14      +1     
  Lines         260     280     +20     
  Branches       15      17      +2     
========================================
+ Hits          215     217      +2     
- Misses         35      54     +19     
+ Partials       10       9      -1

Impacted Files	Coverage Δ
testcontainers/elasticsearch.py	0% <0%> (ø)
testcontainers/core/waiting_utils.py	100% <0%> (+9.52%)	⬆️

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[nivm]

Failed test is tests/test_new_docker_api.py::test_docker_env_variables doesnt related to my change.
Also, It is an environment issue as this test pass in our Jenkins environment.

[SergeyPirogov]

@nivm Thank you for PR, could you please add some tests for elastic search container? See example for DB or Selenium

[codecov-io]

Codecov Report

Merging #19 into master will decrease coverage by 8.85%.
The diff coverage is 0%.

@@            Coverage Diff             @@
##           master      #19      +/-   ##
==========================================
- Coverage   82.69%   73.84%   -8.86%     
==========================================
  Files          13       15       +2     
  Lines         260      302      +42     
  Branches       15       20       +5     
==========================================
+ Hits          215      223       +8     
- Misses         35       66      +31     
- Partials       10       13       +3

Impacted Files	Coverage Δ
testcontainers/redis.py	0% <0%> (ø)
testcontainers/elasticsearch.py	0% <0%> (ø)
testcontainers/core/docker_client.py	83.33% <0%> (-16.67%)	⬇️
testcontainers/core/container.py	77.02% <0%> (-4.52%)	⬇️
testcontainers/core/utils.py	66.66% <0%> (+5.55%)	⬆️

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