Add test for ServerStore deserializer

[thornbill]

Adds test coverage to the deserializer in the ServerStore

[sonarcloud[bot]]

Kudos, SonarCloud Quality Gate passed!   

0 Bugs
0 Vulnerabilities
0 Security Hotspots
0 Code Smells

No Coverage information
0.0% Duplication

[codecov[bot]]

Codecov Report

Merging #371 (035881e) into master (0a1c471) will increase coverage by 0.38%. The diff coverage is 100.00%.

@@            Coverage Diff             @@
##           master     #371      +/-   ##
==========================================
+ Coverage   61.84%   62.22%   +0.38%     
==========================================
  Files          41       41              
  Lines         781      781              
  Branches      162      162              
==========================================
+ Hits          483      486       +3     
+ Misses        270      268       -2     
+ Partials       28       27       -1     

Impacted Files	Coverage Δ
stores/ServerStore.js	100.00% <100.00%> (+21.42%)	:arrow_up:

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