Fix missing docs.count

[james-stead]

Our Elastic cluster has a number of indexes that don't return this value. The indexes do appear to be empty as well from looking at the indexes in elastic. This is the for example is what is in item: {'health': 'green', 'status': 'open', 'index': '', 'uuid': 't_w0eDA9SXS8CGYhYtXhfg', 'pri': '1', 'rep': '1', 'docs.count': None, 'docs.deleted': None, 'store.size': None, 'pri.store.size': None}

[codecov-commenter]

Codecov Report

Merging #91 (aae46d0) into master (7e48e57) will decrease coverage by 0.28%. The diff coverage is 57.14%.

@@            Coverage Diff             @@
##           master      #91      +/-   ##
==========================================
- Coverage   94.40%   94.12%   -0.29%     
==========================================
  Files          15       15              
  Lines         966      970       +4     
==========================================
+ Hits          912      913       +1     
- Misses         54       57       +3     

Flag	Coverage Δ
python	94.12% <57.14%> (-0.29%)	:arrow_down:

Flags with carried forward coverage won't be shown. Click here to find out more.

Impacted Files	Coverage Δ
es/elastic/api.py	84.61% <57.14%> (-2.39%)	:arrow_down:

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[dpgaspar]

Hi @james-stead,

Thank you for your contribution, looks good to me.

Can you please update your branch with the current master. I've just merged a PR that will fix CI lint step.

More completeness and stability would be super great if you could add a test to verify that an index without a count will behave has expected