MDL-14679 fixed some more $db's

mod/data/import.php

@@ -194,7 +194,7 @@ function my_file_get_contents($filename, $use_include_path = 0) {
 // Read the records from the given file.
 // Perform a simple field count check for each record.
 function data_get_records_csv($filename, $fielddelimiter=',', $fieldenclosure="\n") {
-    global $db;
+    global $DB;
 
     if (empty($fielddelimiter)) {
         $fielddelimiter = ',';

mod/data/restorelib.php

@@ -321,8 +321,7 @@ function data_content_restore_mods ($old_record_id, $new_record_id, $old_data_id
 
 
 function data_restore_files ($old_data_id, $new_data_id, $old_field_id, $new_field_id, $old_record_id, $new_record_id, $recinfo, $restore) {
-
-    global $CFG, $db;
+    global $CFG, $DB;
 
     $status = true;
     $todo = false;