Upgrade ZF components. Zend_Json

[okorshenko]

Description
Upgrade components from ZF1 to ZF2

As a long term goal, we would like to eliminate knowledge about 3rd party libraries from Magento code base. Magento code still can use 3rd party libraries, but they must be wrapped by Magento interfaces and classes (adapters) so that 3rd party libraries can be easily substituted by newest versions or alternative implementations.

Acceptance Criteria

1. Magento interfaces are defined and can be used instead of ZF1 classes in Magento code
2. Default implementations for new interfaces are defined and configured as the preferences for new interfaces
3. Client code of the ZF1 components is refactored to use Magento interfaces
4. Zend classes are used as private services in Magento adapters
5. Backward compatibility is preserved
6. ZF1 components are updated to ZF2

List of the components

#	Component Name (total usages count)	Module Name	Usages Count
1	Zend_Json (total: 51)	Framework\DataObject.php	1
		Framework\Controller	1
		Framework\Json	2
		Framework\Module	3
		Framework\Webapi	3
		Magento\Weee	6
		Framework\Data	4
		Magento\Theme	31

[okorshenko]

@dmanners if you would like to work on this, I can assign this to you.

[dmanners]

Updated List of the components

#	Component Name (total usages count)	Module Name	Usages Count
1	Zend_Json (total: 15)	Framework\DataObject.php	1
		Framework\Controller	1
		Framework\Json	2
		Framework\Module	3
		Framework\Webapi	3
		Framework\Data	4
		Magento\Widget	1

[dmanners]

Updated List of the components as of July

#	Component Name (total usages count)	Module Name	Usages Count
1	Zend_Json (total: 13)	Magento\Customer	1
		Framework\DataObject.php	1
		Framework\Controller	1
		Framework\Json	2
		Framework\Module	5
		Framework\Webapi	3