UTF8MB4 is utf8 now, not cesu8

Author: Andrey Sidorov

test/integration/connection/encoding/test-charset-results.js

@@ -9,11 +9,7 @@ function tryEncoding (encoding, cb) {
   connection.query('set character_set_results = ?', [encoding], function (err) {
     connection.query('SELECT ?', [payload], function (err, rows, fields) {
       assert.ifError(err);
-      var iconvEncoding = encoding;
-      if (encoding === 'utf8mb4') {
-        iconvEncoding = 'cesu8';
-      }
-      assert.equal(mysql.CharsetToEncoding[fields[0].characterSet], iconvEncoding);
+      assert.equal(mysql.CharsetToEncoding[fields[0].characterSet], encoding);
       assert.equal(fields[0].name, payload);
       assert.equal(rows[0][fields[0].name], payload);
       cb();