Default UTF-8 encoding for XML

[buskamuza]

Preconditions (*)

1. Magento ver. 2.3.0

Steps to reproduce (*)

run code quality tool

Expected result (*)

specify default encoding for xml should be utf-8

Actual result (*)

1. code quality tool returns warnings.

Summary (*)

Specify UTF-8 encoding in XML files. See magento/architecture#57

AC:

• all XML files updated
• a static test that validates that encoding is specified (can be UTF-8 or other)

Examples (*)

[magento-engcom-team]

Hi @buskamuza. Thank you for your report.
To help us process this issue please make sure that you provided the following information:

• Summary of the issue
• Information on your environment
• Steps to reproduce
• Expected and actual results

Please make sure that the issue is reproducible on the vanilla Magento instance following Steps to reproduce. To deploy vanilla Magento instance on our environment, please, add a comment to the issue:

@magento-engcom-team give me $VERSION instance

where $VERSION is version tags (starting from 2.2.0+) or develop branches (for example: 2.3-develop).
For more details, please, review the Magento Contributor Assistant documentation.

@buskamuza do you confirm that you was able to reproduce the issue on vanilla Magento instance following steps to reproduce?

• yes
• no

[magento-engcom-team]

Hi @irajneeshgupta. Thank you for working on this issue.
In order to make sure that issue has enough information and ready for development, please read and check the following instruction: 👇

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[magento-engcom-team]

@irajneeshgupta Thank you for verifying the issue. Based on the provided information internal tickets MAGETWO-97819, MAGETWO-97820 were created

[magento-engcom-team]

Hi @engcom-backlog-nazar. Thank you for working on this issue.
Looks like this issue is already verified and confirmed. But if your want to validate it one more time, please, go though the following instruction:

• 1. Add/Edit Component: XXXXX label(s) to the ticket, indicating the components it may be related to.

• 2. Verify that the issue is reproducible on 2.3-develop branch

  Details

  - Add the comment @magento-engcom-team give me 2.3-develop instance to deploy test instance on Magento infrastructure.
  - If the issue is reproducible on 2.3-develop branch, please, add the label Reproduced on 2.3.x.
  - If the issue is not reproducible, add your comment that issue is not reproducible and close the issue and stop verification process here!

• 3. Verify that the issue is reproducible on 2.2-develop branch.

  Details

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• 4. If the issue is not relevant or is not reproducible any more, feel free to close it.

[vpodorozh]

@magento-engcom-team give me 2.3.0 instance

[magento-engcom-team]

Hi @vpodorozh. Thank you for your request. I'm working on Magento 2.3.0 instance for you

[magento-engcom-team]

Hi @vpodorozh, here is your Magento instance.
Admin access: https://i-20384-2-3-0.instances.magento-community.engineering/admin
Login: admin Password: 123123q
Instance will be terminated in up to 3 hours.

[github-jira-sync-bot]

❌ Cannot export the issue. This GitHub issue is already linked to Jira issue(s): https://jira.corp.magento.com/browse/AC-809