test(carbonserver): unit tests were escaped

[inimaz]

Description

Some unit tests of the carbonserver were not being run by the CI.

This PR runs them and updates the ones that were failing

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 69.75%. Comparing base (cc62d32) to head (c9ff946).
⚠️ Report is 7 commits behind head on master.

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #1068      +/-   ##
==========================================
+ Coverage   68.73%   69.75%   +1.02%     
==========================================
  Files          41       42       +1     
  Lines        3873     3971      +98     
==========================================
+ Hits         2662     2770     +108     
+ Misses       1211     1201      -10     

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