Add Short-term solution for hiddenProperties in model

[frbuceta]

Implement short-term solution to hide properties in a model

close: #1914

Checklist

👉 Read and sign the CLA (Contributor License Agreement) 👈

• npm test passes on your machine
• New tests added or existing tests modified to cover all changes
• Code conforms with the style guide
• API Documentation in code was updated
• Documentation in /docs/site was updated
• Affected artifact templates in packages/cli were updated
• Affected example projects in examples/* were updated

👉 Check out how to submit a PR 👈

[bajtos]

Thank you @frbuceta for the pull request. Please rebase your patch on top of the latest master (see https://loopback.io/doc/en/lb4/submitting_a_pr.html) and add a test to verify your changes & prevent regressions in the future.

[frbuceta]

The rest of the steps are not necessary, right?

[bajtos]

Thank you for the new changes, the pull request looks almost good now! Please see my comments below.

Also, please rebase your pull request on top of the latest master using git rebase (we are not using git merge for that) and squash all commits into a single one.

[frbuceta]

Can I close this Pull Request and open another? I deleted the fork and now it does not let me change anything @bajtos frbuceta wants to merge 7 commits into strongloop:master from unknown repository