change logrotate only run when ACK starts for the first time for conf.

I advised to put the logrotate caller in test_runner.py and it was not the best advice.
'test_runner.py' can be called multiple time in single ACK run. Besides, there is no way to keep log files when we execute 'test_runner.py' after creating 'test_run.conf' with '-d' option. Hence removed it back to 'ack_cli.py'.