Preliminary patch for the following bugs:

- BUG#15934: Instance manager fails to work;
  - BUG#18020: IM connect problem;
  - BUG#18027: IM: Server_ID differs;
  - BUG#18033: IM: Server_ID not reported;
  - BUG#21331: Instance Manager: Connect problems in tests;

The only test suite has been changed
(server codebase has not been modified).

mysql-test/include/im_check_env.inc

@@ -2,10 +2,6 @@
 # that ensure that starting conditions (environment) for the IM-test are as
 # expected.
 
-# Wait for mysqld1 (guarded instance) to start.
-
---exec $MYSQL_TEST_DIR/t/wait_for_process.sh $IM_MYSQLD1_PATH_PID 30 started
-
 # Check the running instances.
 
 --connect (mysql1_con,localhost,root,,mysql,$IM_MYSQLD1_PORT,$IM_MYSQLD1_SOCK)
@@ -14,6 +10,8 @@
 
 SHOW VARIABLES LIKE 'server_id';
 
+--source include/not_windows.inc
+
 --connection default
 
 # Let IM detect that mysqld1 is online. This delay should be longer than