[backport #1131] fix updating a component's data via SerializedState msg

[adlarkin]

Signed-off-by: Ashton Larkin ashton@openrobotics.org

Note to maintainers: Remember to rebase

[codecov]

Codecov Report

Merging #1149 (5c9b628) into ign-gazebo3 (c0ad543) will increase coverage by 0.20%.
The diff coverage is 55.00%.

❗ Current head 5c9b628 differs from pull request most recent head 3ab37ef. Consider uploading reports for the commit 3ab37ef to get more accurate results

@@               Coverage Diff               @@
##           ign-gazebo3    #1149      +/-   ##
===============================================
+ Coverage        77.43%   77.64%   +0.20%     
===============================================
  Files              222      222              
  Lines            12797    12805       +8     
===============================================
+ Hits              9909     9942      +33     
+ Misses            2888     2863      -25     

Impacted Files	Coverage Δ
src/EntityComponentManager.cc	89.09% <55.00%> (+4.77%)	⬆️

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[chapulina]

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