Return `emailChecksum` for invitations

[maxceem]

Overview

Recently, we started masking emails inside invitation objects when returning invitations to non-admin users see PR #418 and related challenge https://www.topcoder.com/challenges/30108867 for the reference.

Now for a few situations in the client-side we have to identify the invitation by masked email, but we cannot: appirio-tech/connect-app#3412 and appirio-tech/connect-app#3392.

To accomplish the mentioned issues client-side we have to return md5 hash of email from the server, so on the client-side when we cannot see the actual email, because it's masked, we can still identify which invitation it was.

Task

• All the endpoints that return invitations should return additional field emailChecksum in each invitation object additionally to email. See the list of such endpoints in this challenge description https://www.topcoder.com/challenges/30108867 (ignore GET /v4/projects/db endpoint).
• emailChecksum should be always returned, no matter if email field is masked or non-masked.

Implementation requirements

Technically, we should implement it a similar way as we did for masking emails:

• create a reusable method util.populateEmailChecksum(jsonPath, data)
• this method should find objects using jsonPath and populate them with additional field emailChecksum if email field is a string. If email field is not a string, then emailChecksum should be set the same as email. For more details on how to use jsonPath see previous challenge spec https://www.topcoder.com/challenges/30108867
• after implementing such a method, apply it to all endpoints where we need it, and use the correct jsonPath adjusted for a certain endpoint.

Verification

Provide a demo video in which show how you call ALL the required endpoints one by one and all of them return invites with emailChecksum populated.

[maxceem]

Closing this as we don't need this anymore as per appirio-tech/connect-app#3722 (comment)