MTO-37: [Variation] Checkout as Guest if Billing address != Shipping address

- Functional test implemented.

Author: SiarheiAndreyeu

dev/tests/functional/tests/app/Magento/Checkout/Test/TestCase/OnePageCheckoutTest.xml

@@ -168,12 +168,13 @@
             <constraint name="Magento\Checkout\Test\Constraint\AssertOrderSuccessPlacedMessage" />
             <constraint name="Magento\Sales\Test\Constraint\AssertOrderGrandTotal" />
         </variation>
-        <variation name="OnePageCheckoutTestVariation9" summary="One Page Checkout Products with Tier Prices">
+        <variation name="OnePageCheckoutTestVariation9" summary="One Page Checkout Products with different shipping/billing address and Tier Prices" ticketId="MAGETWO-42604">
             <data name="tag" xsi:type="string">stable:no</data>
             <data name="products/0" xsi:type="string">catalogProductSimple::simple_with_tier_price_and_order_qty_3</data>
             <data name="customer/dataset" xsi:type="string">default</data>
             <data name="checkoutMethod" xsi:type="string">guest</data>
             <data name="shippingAddress/dataset" xsi:type="string">UK_address</data>
+            <data name="billingAddress/dataset" xsi:type="string">UK_address_2_without_email</data>
             <data name="shipping/shipping_service" xsi:type="string">Flat Rate</data>
             <data name="shipping/shipping_method" xsi:type="string">Fixed</data>
             <data name="prices" xsi:type="array">

dev/tests/functional/tests/app/Magento/Customer/Test/Repository/Address.xml

@@ -189,6 +189,18 @@
             <field name="telephone" xsi:type="string">555-55-555-55</field>
         </dataset>
 
+        <dataset name="UK_address_2_without_email">
+            <field name="firstname" xsi:type="string">Billy</field>
+            <field name="lastname" xsi:type="string">Holiday</field>
+            <field name="company" xsi:type="string">Magento %isolation%</field>
+            <field name="city" xsi:type="string">Liverpool</field>
+            <field name="street" xsi:type="string">99 Henry St</field>
+            <field name="postcode" xsi:type="string">SE1 7RW</field>
+            <field name="country_id" xsi:type="string">United Kingdom</field>
+            <field name="region" xsi:type="string">Liverpool</field>
+            <field name="telephone" xsi:type="string">555-55-555-55</field>
+        </dataset>
+
         <dataset name="UK_address_without_email">
             <field name="firstname" xsi:type="string">Jane</field>
             <field name="lastname" xsi:type="string">Doe</field>