Add Instance Manager tests.
mysql-test/include/im_check_os.inc:
Currently Instance Manager tests are known to work only on UNIX platform.
This header file is included in each IM-test in order to skip the test
on Windows.
mysql-test/r/im_daemon_life_cycle.result:
Results file for Instance Manager daemon test.
mysql-test/r/im_life_cycle.result:
Results file for Instance Manager life cycle test.
mysql-test/r/im_options_set.result:
Results file for Instance Manager SET statement test.
mysql-test/r/im_options_unset.result:
Results file for Instance Manager UNSET statement test.
mysql-test/r/im_utils.result:
Results file for Instance Manager utils test.
mysql-test/t/im_daemon_life_cycle-im.opt:
Options file for Instance Manager daemon test.
mysql-test/t/im_daemon_life_cycle.imtest:
Instance Manager daemon test (mysqltestrun-part).
mysql-test/t/im_life_cycle.imtest:
Instance Manager life cycle test.
mysql-test/t/im_options_set.imtest:
Instance Manager SET statement test.
mysql-test/t/im_options_unset.imtest:
Instance Manager UNSET statement test.
mysql-test/t/im_utils.imtest:
Instance Manager utils test.
mysql-test/t/kill_n_check.sh:
The helper script. Its main idea is to kill some process and
check that the process will (or will not) be restarted.
