move EI docs from TFS Rest API docs to TFS python docs

[ChoiByungWook]

Issue #, if available:
#515

Description of changes:
Moved incorrect EI TFS docs from the Rest API TFS docs to the Python TFS docs.

Merge Checklist

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• I have added tests that prove my fix is effective or that my feature works (if appropriate)
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[codecov-io]

Codecov Report

Merging #637 into master will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##           master     #637   +/-   ##
=======================================
  Coverage   92.73%   92.73%           
=======================================
  Files          71       71           
  Lines        5437     5437           
=======================================
  Hits         5042     5042           
  Misses        395      395

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