[Backport] Declare module namespace before template path name(Magento_Sales::order/info.phtml).

[gelanivishal]

Original pull request

#16206

Description

When we override block info(Magento\Sales\Block\Order\Info) to my custom module.
It throws an error and finding order/info.phtml in my custom module.
I tried to extend Block Magento\Sales\Block\Order\Info from my custom module.

1 exception(s):
Exception #0 (Magento\Framework\Exception\ValidatorException): Invalid template file: 'order/info.phtml' in module: 'Vendor_Module' block's name: 'sales.order.info'

Fixed Issues (if relevant)

1. Declare module namespace before template path name.

Manual testing scenarios

1. I override info block

<preference for="Magento\Sales\Block\Order\Info"
				type="Vendor\Module\Block\Order\Info" />

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 @gelanivishal. Thank you for your contribution.
We will aim to release these changes as part of 2.1.15.
Please check the release notes for final confirmation.