MAGETWO-84955: Set Current Store from Store Code if isUseStoreInUrl #12529

 - Merge Pull Request magento/magento2#12529 from osrecio/magento2:PR#12450_2.2
 - Merged commits:
   1. ff0e2018

app/code/Magento/Store/App/Request/PathInfoProcessor.php

@@ -44,7 +44,7 @@ class PathInfoProcessor implements \Magento\Framework\App\Request\PathInfoProces
 
         if ($store->isUseStoreInUrl()) {
             if (!$request->isDirectAccessFrontendName($storeCode) && $storeCode != Store::ADMIN_CODE) {
-                $this->storeManager->setCurrentStore($storeCode);
+                $this->storeManager->setCurrentStore($store->getCode());
                 $pathInfo = '/' . (isset($pathParts[1]) ? $pathParts[1] : '');
                 return $pathInfo;
             } elseif (!empty($storeCode)) {

app/code/Magento/Store/Test/Unit/App/Request/PathInfoProcessorTest.php

@@ -47,6 +47,7 @@ class PathInfoProcessorTest extends \PHPUnit\Framework\TestCase
         )->with(
             'storeCode'
         )->willReturn($store);
+        $store->expects($this->once())->method('getCode')->will($this->returnValue('storeCode'));
         $store->expects($this->once())->method('isUseStoreInUrl')->will($this->returnValue(true));
         $this->_requestMock->expects(
             $this->once()