Fix functional tests.

Author: nmalevanec

app/code/Magento/Customer/Test/Mftf/Data/CustomerData.xml

@@ -21,7 +21,7 @@
         <data key="firstname">John</data>
         <data key="lastname">Doe</data>
         <data key="middlename">S</data>
-        <data key="fullname">John Doe</data>s
+        <data key="fullname">John Doe</data>
         <data key="password">pwdTest123!</data>
         <data key="prefix">Mr</data>
         <data key="suffix">Sr</data>