rework: Refactor candidates

[d-beezee]

No description provided.

[github-actions]

Tests difference:

New Tests

< Check NotFound middleware - should return 404 and a not found err
< GET /campaigns/:campaignId/candidates  - Should filter by tryber-ids excluding values
< GET /campaigns/:campaignId/candidates  - Should filter by tryber-ids excluding values with T-char
< GET /campaigns/:campaignId/candidates  - Should filter by tryber-ids including and excluding values
< GET /campaigns/:campaignId/candidates  - Should filter by tryber-ids including and excluding values with T-char
< GET /campaigns/:campaignId/candidates  - Should filter by tryber-ids including values
< GET /campaigns/:campaignId/candidates  - Should filter by tryber-ids including values with T-char
< Get Example middleware - Should return false if path does not exists
< Get Example middleware - Should return false if path does not have method
< Get Example middleware - Should return false if path method does not have response
< Get Example middleware - Should return false if path method does not have response with requested status
< Get Example middleware - Should return false if path method response does not have application/json content
< Get Example middleware - Should return false if path method response does not have content
< Get Example middleware - Should return first example if no specific example is requested
< Get Example middleware - Should return requested example if a specific example is requested
< Get Example middleware - should return a middleware
< Not Implemented - should return a not implemented error

Removed Tests

> GET /campaigns/:campaignId/candidates  - Should filter by os excluding values
> GET /campaigns/:campaignId/candidates  - Should filter by os including and excluding values
> GET /campaigns/:campaignId/candidates  - should order by level id

[coveralls]

coverage: 77.217% (+0.2%) from 77.028%
when pulling ecf4682 on refactor-candidates
into 9fec62e on develop.