[ISSUE #9555 ]fix the npe in the hashCode method when subscriptionDataSet is null

[1782935682]

Which Issue(s) This PR Fixes

Fixes #9555

Brief Description

How Did You Test This Change?

[codecov-commenter]

Codecov Report

❌ Patch coverage is 0% with 1 line in your changes missing coverage. Please review.
✅ Project coverage is 47.97%. Comparing base (e4b731c) to head (52f1848).
⚠️ Report is 7 commits behind head on develop.

Files with missing lines	Patch %	Lines
...protocol/subscription/SubscriptionGroupConfig.java	0.00%	1 Missing ⚠️

Additional details and impacted files

@@              Coverage Diff              @@
##             develop    #9556      +/-   ##
=============================================
- Coverage      48.10%   47.97%   -0.14%     
+ Complexity     12063    12024      -39     
=============================================
  Files           1313     1313              
  Lines          92771    92770       -1     
  Branches       11862    11863       +1     
=============================================
- Hits           44629    44503     -126     
- Misses         42636    42745     +109     
- Partials        5506     5522      +16     

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