Feature/feedback tool fix

[lbeaufort]

json.loads() is expecting a string in JSON format:
'{"param":"value"}'.
response.body needs to be decoded in Python 3

[codecov-io]

Codecov Report

Merging #1387 into release/public-20171011 will not change coverage.
The diff coverage is n/a.

@@                   Coverage Diff                    @@
##           release/public-20171011    #1387   +/-   ##
========================================================
  Coverage                    79.49%   79.49%           
========================================================
  Files                           46       46           
  Lines                         3297     3297           
  Branches                       497      497           
========================================================
  Hits                          2621     2621           
  Misses                         676      676

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