fix action group, revert i18n changes

Author: engcom-Charlie

app/code/Magento/Sales/Test/Mftf/ActionGroup/AdminGoToCreditmemoViewActionGroup.xml

@@ -16,7 +16,7 @@
             <argument name="identifier" type="string"/>
         </arguments>
 
-        <amOnPage url="{{AdminCreditMemoViewPage.url}}/{{identifier}}" stepKey="amOnCreditmemoViewPage"/>
+        <amOnPage url="{{AdminCreditMemoViewPage.url}}{{identifier}}" stepKey="amOnCreditmemoViewPage"/>
         <waitForPageLoad stepKey="waitForPageLoad"/>
     </actionGroup>
 </actionGroups>

app/code/Magento/Sales/Test/Mftf/Test/AdminOpenCreditmemoViewPageWithWrongCreditmemoIdTest.xml

@@ -16,11 +16,9 @@
             <severity value="MAJOR"/>
             <group value="sales"/>
         </annotations>
-
         <before>
             <actionGroup ref="AdminLoginActionGroup" stepKey="LoginAsAdmin"/>
         </before>
-
         <after>
             <actionGroup ref="AdminLogoutActionGroup" stepKey="logout"/>
         </after>
@@ -30,9 +28,7 @@
         </actionGroup>
 
         <waitForPageLoad stepKey="waitForPageLoad"/>
-
         <seeInCurrentUrl url="{{AdminCreditMemosGridPage.url}}" stepKey="redirectToCreditMemosGridPage"/>
-
-        <actionGroup ref="AssertAdminPageIs404ActionGroup" stepKey="see404PageOnAdmin"/>
+        <see selector="{{AdminMessagesSection.error}}" userInput='This creditmemo no longer exists.' stepKey="seeErrorMessage"/>
     </test>
 </tests>