Migrate NodeJS installation from official repository to an unofficial source

[mauromalara]

Because of the recent migration of NodeJS to a new repository our installation/upgrade tests were affected.

Ref.:

• https://github.com/nodesource/distributions/wiki/How-to-migrate-to-the-new-repository
• Installation Scripts deprecated or not? nodesource/distributions#1639 (comment)

This mainly affected some old OS we support, e.g., Ubuntu Trusty.

So, I'd recommend:

1. Add the required NodeJS packages to AWS S3 and use them in our code
2. Use other repositories (e.g.: https://unofficial-builds.nodejs.org/download/)

Tasks

• Change the way we install NodeJS in all our Docker files
• Generate and push the base images
• Generate and push the targeted images
• Run affected tests
  • Installation tests
  • Upgrade tests
  • More (if required)

[mauromalara]

Justifying the objective: "Very high impact bugs"

NodeJS deciding that its repository is not available anymore or deleting the scripts could delay a release.

[rauldpm]

Maybe we should remove the node install instead of maintaining them if they are not necessary