MAGETWO-70327: Customer admin grid incorrectly filters by Date of Birth field

Author: slopukhov

app/code/Magento/Ui/Component/Form/Element/DataType/Date.php

@@ -34,7 +34,7 @@ class Date extends AbstractDataType
     /**
      * @var TimezoneInterface
      */
-    protected $localeDate;
+    private $localeDate;
 
     /**
      * Constructor