#561 Implement working functionality for the GET /curriculum/:curriculumAssessmentId route

Proposed changes

This pull request close #561 which adds a route for details of a specific CurriculumAssessment. It created these scenarios:

The endpoint for this route handler is '/curriculum/:curriculumAssessmentId', where :curriculumAssessmentId is a URL parameter that represents the ID of the CurriculumAssessment.
The programId associated with the curriculumAssessmentId is retrieved using the getProgramIdByProgramAssessmentId() function.
The programRole of the authenticated user for this program is retrieved using the getPrincipalProgramRole() function.
If the programRole is not defined or is 'Participant', a UnauthorizedError is thrown with an appropriate error message.
The curriculumAssessment object associated with the curriculumAssessmentId is retrieved using the getCurriculumAssessment() function.

There is also one new function created in the Service file :

getProgramIdByProgramAssessmentId

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