MAGETWO-35264: Unable to request Soap service without plugging in CustomAttributeMap config

- Added class description and Fixed typos

Author: anupdugar

app/code/Magento/Eav/Model/EavCustomAttributeTypeLocator.php

@@ -10,6 +10,9 @@
 use Magento\Framework\Exception\NoSuchEntityException;
 use Magento\Framework\Webapi\CustomAttributeTypeLocatorInterface;
 
+/**
+ * Class to locate types for Eav custom attributes
+ */
 class EavCustomAttributeTypeLocator implements CustomAttributeTypeLocatorInterface
 {
     /**

app/code/Magento/Eav/Test/Unit/Model/EavCustomAttributeTypeLocatorTest.php

@@ -157,9 +157,9 @@ public function testGetAllServiceDataInterfaceEmpty()
     public function testGetAllServiceDataInterface()
     {
         $serviceBackendModelDataInterfaceMapData = [
-            'ServiceA' => ['BackedA' => 'ServiceDataInterfaceA'],
-            'ServiceB' => ['BackedB' => 'ServiceDataInterfaceB', 'BackedC' => 'ServiceDataInterfaceC'],
-            'ServiceC' => ['BackedD' => 'ServiceDataInterfaceD']
+            'ServiceA' => ['BackendA' => 'ServiceDataInterfaceA'],
+            'ServiceB' => ['BackendB' => 'ServiceDataInterfaceB', 'BackendC' => 'ServiceDataInterfaceC'],
+            'ServiceC' => ['BackendD' => 'ServiceDataInterfaceD']
         ];
         $this->eavCustomAttributeTypeLocator = new EavCustomAttributeTypeLocator(
             $this->attributeRepository, [], $serviceBackendModelDataInterfaceMapData