Check_MK Werk 6224: Prevent multiple mkeventd's from being started in some situations

ID: 6224 Title: Prevent multiple mkeventd's from being started in some situations Component: Event Console Level: 1 Class: Bug fix Version: 1.6.0i1 In rare circumstances, a non-responsive mkeventd process would stick around after an OMD restart, and the new one would not be aware of the other one's existance due to duplicated cleanup of the PID file in the Event Console's init script and the process itself respectively. We remove the cleanup in the init script, as it is more coarse.