chore: add request_type key

[KathurimaKimathi]

• this key is used in mycarehub to determine which service request to resolve

Review Checklist

Summary*

• fix: Bugfix for Add the items tackled here as checklists
• feat: Completed task
• chore: Incomplete task
  • test: Sub-task 1

Structure*

• The Pull Request has a proper title that conforms to our MR title standards
• The Pull Request has one commit, and if there are more than one, they should be squashed
• The commit should have a proper title and a short description
• The commit must be signed off
• Unused imports are not present
• Dead code is not present
• Ensure dry running library to confirm changes

Tests

• Proper and high quality unit, integration and acceptance(if applicable) tests have been written
• The coverage threshold should not be lowered

Sign off*

• All comments have been resolved by the reviewers
• Approved by Czar {replace_with_czar_name}
• Signed off by second reviewer {replace_with_name}
• Ensure all checks are done before merging ⚠️
• All PRs needs to be signed before merging ⚠️

N/B

• Add a checklist if more than one item is done.
• Add screenshots and/or images where necessary
• Indicate any breakages caused in the UI ❗
• Where necessary, indicate which issue the Pull Request solves (Closes #)
• Any new files are updated in the folder structure in the README

[codecov]

Codecov Report

Merging #127 (267edfc) into develop (e14044e) will decrease coverage by 0.03%.
The diff coverage is 0.00%.

@@              Coverage Diff              @@
##             develop     #127      +/-   ##
=============================================
- Coverage      50.37%   50.35%   -0.03%     
  Complexity       294      294              
=============================================
  Files             43       43              
  Lines           1987     1988       +1     
  Branches         175      175              
=============================================
  Hits            1001     1001              
- Misses           911      912       +1     
  Partials          75       75              

Files	Coverage Δ
.../org/openmrs/module/mycarehub/utils/Constants.java	62.50% <ø> (ø)
...rehub/api/service/impl/AppointmentServiceImpl.java	55.62% <0.00%> (-0.34%)	⬇️