Previously for correct termination, the PandaController called the finish-function of the openocd wrapper, invoked a coroutine switch and waited for the openocd wrapper to finish up and switch coroutine again, so the PandaController could exit with correct exitStatus. Now the openocd-wrapper directly exits with chosen exit status. Change-Id: I8d318a4143c53340896ccee4d059a0d79fdcfe89