Remove zend json from json result controller

[dmanners]

Description

This PR is a reworking of #10367
Since Zend_Json should no longer be used update to the \Magento\Framework\Serialize\Serializer\Json instead. So that we do not break backwards compatibility we will need to allow for the type \Magento\Framework\DataObject to be passed into the method and but we need to convert this into an array first.

Fixed Issues (if relevant)

1. Upgrade ZF components. Zend_Json #9236

Manual testing scenarios

1. Check that controllers with result json work with setting data as multiple types.

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)

[ishakhsuvarov]

@dmanners Thank you for the continuous effort on the way of removing outdated dependencies.

Taking into the account previous conversation (the one you linked) I am going to spin off all the functional tests to see if anything is broken this time. I'll get back to you with the results.

Meanwhile I would suggest adding/updating tests to make sure all possible cases are supported.