Test improvements for email notifications

[alexeykazakov]

See #1077 (comment)

[sonarcloud]

Quality Gate passed

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
0.0% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarCloud

[openshift-ci]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: alexeykazakov, mfrancisc

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[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 85.07%. Comparing base (47e819d) to head (b2fcf3c).
Report is 1 commits behind head on master.

Additional details and impacted files

@@           Coverage Diff           @@
##           master    #1078   +/-   ##
=======================================
  Coverage   85.07%   85.07%           
=======================================
  Files          55       55           
  Lines        5038     5038           
=======================================
  Hits         4286     4286           
  Misses        581      581           
  Partials      171      171           

see 2 files with indirect coverage changes