MQE-1460: Deliver weekly PR

- Clear filters before selecting all customers

Author: tomreece

app/code/Magento/Customer/Test/Mftf/Test/ChangeCustomerGroupTest.xml

@@ -70,6 +70,7 @@
         </annotations>
 
         <remove keyForRemoval="filterCustomer"/>
+        <actionGroup ref="clearFiltersAdminDataGrid" stepKey="clearFilters" before="selectCustomer"/>
         <actionGroup ref="AdminSelectAllCustomers" stepKey="selectCustomer"/>
     </test>
 </tests>