Migrate FhirStoreUtilTest to Junit5

[meetmehta1198]

Description of what I changed

Fixes #1103

E2E test

TESTED:

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automated e2e/unit tests.

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[meetmehta1198]

This PR solve some of the test cases based on the Issue #1103

@chandrashekar-s

[meetmehta1198]

cc @bashir2

[codecov-commenter]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 51.67%. Comparing base (b03c2c7) to head (b209ce2).

Additional details and impacted files

@@             Coverage Diff              @@
##             master    #1135      +/-   ##
============================================
- Coverage     51.76%   51.67%   -0.09%     
+ Complexity      669      668       -1     
============================================
  Files            95       95              
  Lines          5612     5612              
  Branches        731      731              
============================================
- Hits           2905     2900       -5     
- Misses         2425     2430       +5     
  Partials        282      282              

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[chandrashekar-s]

Thanks @meetmehta1198 for the changes and apologies for the delay in the review. There are few comments, can you please have a look.

[meetmehta1198]

@chandrashekar-s can you please review this PR

[chandrashekar-s]

Thanks @meetmehta1198 for these changes. I am extremely sorry for delaying the review for this PR as I was involved in some activities of another project. The changes look good, there is only one minor comment. Can you please have a look at that?