[BackPort] Resolve Knockout non-unique elements id in console error

[viral-wagento]

Original Pull Request

#15349

When enabling more than one payment methods from admin, It is giving an error in the console "Found elements with non-unique id billing-address-form "

Description

Fixed Issues (if relevant)

1. Multiple Payment Methods Enabled is giving error in console "Found 3 Elements with non - unique Id" #15348:
2. Issue titleMultiple Payment Methods Enabled is giving error in console "Found 3 Elements with non - unique Id"

Manual testing scenarios

1. Login to Admin Panel > Sales> Payment Methods
2. Enable more than one of Magento payment methods for checkout
3. Add a product to the cart, press F12 to check the console log in the browser

Expected Result

It should not show any error in the console

Actual result

Contribution checklist

• Pull request has a meaningful description of its purpose
• All commits are accompanied by meaningful commit messages
• All new or changed code is covered with unit/integration tests (if applicable)
• All automated tests passed successfully (all builds on Travis CI are green)

[magento-engcom-team]

Hi @viral-wagento. Thank you for your contribution.
Changes from your Pull Request will be available with the upcoming 2.1.15 release.