Fix Security Integration tests

[lezzago]

Issue #, if available:
#300
Description of changes:
Fix Security integ assertions
CheckList:
[X] Commits are signed per the DCO using --signoff

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[codecov-commenter]

Codecov Report

Merging #326 (dd8d3ac) into main (5f18a5c) will decrease coverage by 0.05%.
The diff coverage is n/a.

@@             Coverage Diff              @@
##               main     #326      +/-   ##
============================================
- Coverage     78.59%   78.53%   -0.06%     
+ Complexity      218      217       -1     
============================================
  Files           173      173              
  Lines          6975     6975              
  Branches        916      916              
============================================
- Hits           5482     5478       -4     
- Misses         1005     1009       +4     
  Partials        488      488              

Impacted Files	Coverage Δ
...ing/destination/client/DestinationEmailClient.java	72.50% <0.00%> (-5.00%)	⬇️
...ing/model/destination/DestinationContextFactory.kt	66.66% <0.00%> (-3.71%)	⬇️
.../kotlin/org/opensearch/alerting/core/JobSweeper.kt	71.50% <0.00%> (-0.50%)	⬇️

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