Core: update response parse method of message_url for empty nations o…

[Jerevia]

Core: update response parse method of message_url for empty nations or other assets list bug fixes

[codecov-io]

Codecov Report

Merging #447 into master will not change coverage. The diff coverage is n/a.

@@           Coverage Diff           @@
##           master     #447   +/-   ##
=======================================
  Coverage   51.72%   51.72%           
=======================================
  Files           9        9           
  Lines         464      464           
  Branches       39       39           
=======================================
  Hits          240      240           
  Misses        221      221           
  Partials        3        3

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