Workaround Fetch Binary breaks with latest JPA HAPI FHIR Server

[ndegwamartin]

IMPORTANT: Where possible all PRs must be linked to a Github issue

Resolves #83

Engineer Checklist

• I have written Unit tests for any new feature(s) and edge cases for
  bug fixes
• I have added documentation for any new feature(s) and configuration
  option(s) on the README.md
• I have run mvn spotless:check to check my code follows the project's
  style guide
• I have run mvn clean test jacoco:report to confirm the coverage report
  was generated at plugins/target/site/jacoco/index.html
• I ran mvn clean package right before creating this pull request.

[codecov-commenter]

Codecov Report

Attention: Patch coverage is 0% with 23 lines in your changes missing coverage. Please review.

Project coverage is 43.27%. Comparing base (712d495) to head (d49fa7b).
Report is 30 commits behind head on main.

Files with missing lines	Patch %	Lines
...egister/fhir/gateway/plugins/RestTemplateUtil.java	0.00%	9 Missing ⚠️
.../org/smartregister/fhir/gateway/plugins/Utils.java	0.00%	8 Missing ⚠️
.../fhir/gateway/plugins/PermissionAccessChecker.java	0.00%	6 Missing ⚠️

Additional details and impacted files

@@             Coverage Diff              @@
##               main      #84      +/-   ##
============================================
- Coverage     45.01%   43.27%   -1.75%     
- Complexity      130      135       +5     
============================================
  Files            16       17       +1     
  Lines          1213     1345     +132     
  Branches        146      158      +12     
============================================
+ Hits            546      582      +36     
- Misses          600      697      +97     
+ Partials         67       66       -1     

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