[5.2] Fix GenerateSspiClientContext to retry negotiation with default port

[dauinsight]

Backports: #2559

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 72.62%. Comparing base (da57fa9) to head (db1b4bc).
Report is 1 commits behind head on release/5.2.

Additional details and impacted files

@@               Coverage Diff               @@
##           release/5.2    #2815      +/-   ##
===============================================
+ Coverage        72.59%   72.62%   +0.03%     
===============================================
  Files              310      310              
  Lines            61930    61930              
===============================================
+ Hits             44958    44979      +21     
+ Misses           16972    16951      -21     

Flag	Coverage Δ
addons	92.88% <ø> (ø)
netcore	76.79% <ø> (+<0.01%)	⬆️
netfx	70.24% <ø> (+0.04%)	⬆️

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