MDL-45242 Lib: Replace calls to deprecated functions

In all cases changes have been kept to a minimum while not making
the code completely horrible. For example, there are many instances
where it would probably be better to rewrite a query entirely, but
I have not done that (in order to reduce the risk of changes).

admin/tool/uploaduser/classes/process.php

@@ -155,7 +155,7 @@ class process {
             'interests',
         );
         // Include all name fields.
-        $this->standardfields = array_merge($this->standardfields, get_all_user_name_fields());
+        $this->standardfields = array_merge($this->standardfields, \core\user_fields::get_name_fields());
     }
 
     /**