MAGETWO-38380: Add "all" store code to APIs to allow APIs to work with all stores

Author: Joan He

dev/tests/api-functional/framework/Magento/TestFramework/TestCase/Webapi/Adapter/Soap.php

@@ -122,8 +122,7 @@ public function generateWsdlUrl($services, $storeCode = null)
         /** Sort list of services to avoid having different WSDL URLs for the identical lists of services. */
         //TODO: This may change since same resource of multiple versions may be allowed after namespace changes
         ksort($services);
-        /** @var \Magento\Store\Model\StoreManagerInterface $storeManager */
-        if ($storeCode !== null) {
+        if ($storeCode == null) {
             $storeCode = Bootstrap::getObjectManager()
                 ->get('Magento\Store\Model\StoreManagerInterface')
                 ->getStore()