[Tango] S45 Controller Refactoring

[Github] extra tests for current interception behavior #965

[API] MAGETWO-32833: Soap/Rest tests fail on CE version

[Extensibility] Magetwo 31938 unit test

MAGETWO-31078: M2 GitHub Update (version 0.42.0-beta5) & Public pull requests

Conflicts:
	app/code/Magento/Checkout/composer.json

[Folks] Sprint 60 - Service Layer: Refactoring of Checkout and related modules

- Suppress warnings for test fixtures

- Fix license header in FirstPlugin

Conflicts:
	app/code/Magento/Sales/Controller/Adminhtml/Creditmemo/AbstractCreditmemo/View.php
	app/code/Magento/Sales/Controller/Adminhtml/Order/Create/Save.php
	app/code/Magento/Sales/Controller/Adminhtml/Order/Creditmemo/Save.php
	app/code/Magento/Sales/Controller/Adminhtml/Order/Invoice/Save.php
	app/code/Magento/Sales/Controller/Adminhtml/Order/Pdfdocs.php
	app/code/Magento/Sales/Controller/Adminhtml/Shipment/AbstractShipment/View.php
	app/code/Magento/Sales/Controller/Download/DownloadCustomOption.php
	dev/tests/unit/testsuite/Magento/Sales/Controller/Adminhtml/Order/Creditmemo/PrintActionTest.php
	dev/tests/unit/testsuite/Magento/Sales/Controller/Adminhtml/Order/Creditmemo/ViewTest.php

- Changed all Backend Result to Framework where needed;

- stitic tests fix

- Changed Backend Result Redirect & Forward to Framework Result;

Conflicts:
	app/code/Magento/Checkout/Service/V1/Cart/ReadService.php
	app/code/Magento/Checkout/Service/V1/Cart/WriteService.php
	app/code/Magento/Checkout/Service/V1/Data/Cart.php
	app/code/Magento/Checkout/Service/V1/Data/Cart/Customer.php
	app/code/Magento/Checkout/Service/V1/Data/CartMapper.php
	app/code/Magento/Checkout/Service/V1/PaymentMethod/WriteService.php
	app/code/Magento/Checkout/Service/V1/PaymentMethod/WriteServiceInterface.php
	app/code/Magento/Checkout/Service/V1/ShippingMethod/WriteService.php
	app/code/Magento/Checkout/Service/V1/ShippingMethod/WriteServiceInterface.php
	app/code/Magento/CheckoutAgreements/Model/CheckoutAgreementsRepository.php
	app/code/Magento/Quote/Model/ShippingMethodManagement.php
	dev/tests/api-functional/testsuite/Magento/Checkout/Service/V1/Address/Shipping/ReadServiceTest.php
	dev/tests/api-functional/testsuite/Magento/GiftMessage/Api/ItemRepositoryTest.php
	dev/tests/static/testsuite/Magento/Test/Php/_files/whitelist/common.txt
	dev/tests/unit/testsuite/Magento/Checkout/Service/V1/Address/Billing/WriteServiceTest.php
	dev/tests/unit/testsuite/Magento/Checkout/Service/V1/Address/ConverterTest.php
	dev/tests/unit/testsuite/Magento/Checkout/Service/V1/Cart/PaymentMethod/BuilderTest.php
	dev/tests/unit/testsuite/Magento/Checkout/Service/V1/Cart/PaymentMethod/ConverterTest.php
	dev/tests/unit/testsuite/Magento/Checkout/Service/V1/Cart/ReadServiceTest.php
	dev/tests/unit/testsuite/Magento/Checkout/Service/V1/Cart/TotalsServiceTest.php
	dev/tests/unit/testsuite/Magento/Checkout/Service/V1/Cart/WriteServiceTest.php
	dev/tests/unit/testsuite/Magento/Checkout/Service/V1/Coupon/ReadServiceTest.php
	dev/tests/unit/testsuite/Magento/Checkout/Service/V1/Data/PaymentMethod/ConverterTest.php
	dev/tests/unit/testsuite/Magento/Checkout/Service/V1/Item/ReaderServiceTest.php
	dev/tests/unit/testsuite/Magento/Checkout/Service/V1/PaymentMethod/ReadServiceTest.php
	dev/tests/unit/testsuite/Magento/Checkout/Service/V1/PaymentMethod/WriteServiceTest.php
	dev/tests/unit/testsuite/Magento/GiftMessage/Service/V1/ReadServiceTest.php
	dev/tests/unit/testsuite/Magento/Quote/Model/Cart/ShippingMethodConverterTest.php
	dev/tests/unit/testsuite/Magento/Quote/Model/CouponManagementTest.php
	dev/tests/unit/testsuite/Magento/Quote/Model/QuoteAddressValidatorTest.php
	dev/tests/unit/testsuite/Magento/Quote/Model/ShippingAddressManagementTest.php

MAGETWO-31570: Make live code test more useful for development process

Merge branch 'MAGETWO-32078-CheckoutAgreements' of github.corp.ebay.com:magento-folks/magento2ce into develop

Merge branch 'develop' of github.corp.ebay.com:magento2/magento2ce into MAGETWO-32078-CheckoutAgreements

Conflicts:
	dev/tests/unit/testsuite/Magento/Store/Model/App/EmulationTest.php
	lib/internal/Magento/Framework/Validator/Factory.php

- Fixed license headers
- Moved fields from GeneralTest to AbstractPlugin

[Ogres] Added Composer Test