Issue #3319175 by Tаo: Fix shchema errors reported during the tests.

config/install/views.view.commerce_pricelist_prices.yml

@@ -469,7 +469,6 @@ display:
           order: DESC
           expose:
             label: ''
-            field_identifier: ''
           exposed: false
       arguments:
         id:

config/optional/views.view.commerce_pricelist_product_prices.yml

@@ -598,7 +598,6 @@ display:
           order: ASC
           expose:
             label: ''
-            field_identifier: ''
           exposed: false
         id:
           id: id
@@ -613,7 +612,6 @@ display:
           order: DESC
           expose:
             label: ''
-            field_identifier: ''
           exposed: false
         quantity:
           id: quantity
@@ -628,7 +626,6 @@ display:
           order: ASC
           expose:
             label: ''
-            field_identifier: ''
           exposed: false
       arguments:
         product_id:

src/Entity/PriceList.php

@@ -421,7 +421,7 @@ class PriceList extends CommerceContentEntityBase implements PriceListInterface
    */
   public static function getDefaultStartDate() {
     $timestamp = \Drupal::time()->getRequestTime();
-    return gmdate(DateTimeItemInterface::DATETIME_STORAGE_FORMAT, $timestamp);
+    return date(DateTimeItemInterface::DATETIME_STORAGE_FORMAT, $timestamp);
   }
 
   /**