Fix expunge when using unique search param

[jamesagnew]

No description provided.

[codecov]

Codecov Report

Merging #1854 into master will increase coverage by 0.00%.
The diff coverage is 100.00%.

@@            Coverage Diff            @@
##             master    #1854   +/-   ##
=========================================
  Coverage     81.27%   81.27%           
  Complexity    14185    14185           
=========================================
  Files           975      975           
  Lines         53051    53052    +1     
  Branches       8447     8447           
=========================================
+ Hits          43115    43116    +1     
  Misses         6695     6695           
  Partials       3241     3241           

Impacted Files	Coverage Δ	Complexity Δ
...n/fhir/jpa/dao/expunge/ResourceExpungeService.java	95.04% <100.00%> (+0.04%)	27.00 <0.00> (ø)
.../fhir/jpa/partition/RequestPartitionHelperSvc.java	84.05% <100.00%> (ø)	16.00 <0.00> (ø)

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