bug #15435 (wait_timeout.test fails with the embedded server)

this test just can't work in the embedded server


mysql-test/t/wait_timeout.test:
  test can't work properly with the embedded server yet

mysql-test/t/wait_timeout.test

+# This tests not performed with embedded server
+-- source include/not_embedded.inc
+
 #
 # Bug #8731: wait_timeout does not work on Mac OS X
 #