housekeeper should not do housekeeping when it is asked to increase log level

Feature ZBXNEXT-101 implemented runtime controls to change process log levels. However, when a sleeping process receives a signal, it has a side effect that the process wakes from sleep. So, for instance, a housekeeper, when woken up, will do housekeeping. Simlarly for other processes. They should continue sleeping for the allotted time instead.