Fixed widget template rendering issue while rewriting widget block.

[sanganinamrata]

Description

Fixed template notation for Magento_CatalogWidget module.

Fixed Issues (if relevant)

Magento version 2.2.x

1. Rewriting product listing widget block breaks its template rendering. #16529: Rewriting product listing widget block breaks its template rendering.2. ...

Manual testing scenarios

N/A

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 @sanganinamrata. Thank you for your contribution
Here is some useful tips how you can test your changes using Magento test environment.
Add the comment under your pull request to deploy test or vanilla Magento instance:

• @magento-engcom-team give me test instance - deploy test instance based on PR changes
• @magento-engcom-team give me {$VERSION} instance - deploy vanilla Magento instance

For more details, please, review the Magento Contributor Assistant documentation

[miguelbalparda]

@sanganinamrata can you please check the failing tests?

[sanganinamrata]

@miguelbalparda - Ok I'll check the failing tests soon and get back to you.

[sanganinamrata]

@gelanivishal Thanks for the quick fix.

[sanganinamrata]

@miguelbalparda : Failing test is fixed, Please have a look.

[magento-engcom-team]

Hi @miguelbalparda, thank you for the review.
ENGCOM-2211 has been created to process this Pull Request

[magento-engcom-team]

Hi @sanganinamrata. Thank you for your contribution.
We will aim to release these changes as part of 2.2.6.
Please check the release notes for final confirmation.

Please, consider to port this solution to 2.3 release line.
You may use Porting tool to port commits automatically.