Initial version of label stage (backend)

[brunotannus]

Description

Included "Label" stage for the aggregation builder, which replaces the values of the answers with their texts.

Useful links

• https://oortcloud.atlassian.net/jira/software/projects/HIT/boards/5?selectedIssue=HIT-192
• https://github.com/ReliefApplications/oort-frontend/tree/HIT-192-add-label-stage-to-aggregation-builder

Type of change

• New feature (non-breaking change which adds functionality)

How Has This Been Tested?

• Have been tested with:
  'dropdown',
  'checkbox',
  'radiogroup',
  'tagbox',
  'matrixdropdown',
  'matrixdynamic'

• Matrixdropdown and matrixdynamic only work for the matrix choices right now, not choices internal to each column

Screenshots

Checklist:

( * == Mandatory )

• * I have set myself as assignee of the pull request
• * My code follows the style guidelines of this project
• * Linting does not generate new warnings
• * I have performed a self-review of my own code
• * I have put the ticket for review, adding the oort-frontend team to the list of reviewers
• * I have commented my code, particularly in hard-to-understand areas
• * I have put JSDoc comment in all required places
• * My changes generate no new warnings
• * I have included screenshots describing my changes if relevant
• * I have selected labels in the Pull Request, according to the changes with code brings

To do:

• Make it work for choices internal to the matrix according to questionMatrixChoices