Parameter Request - Power State Based on Multiple Pings

[mattinatux]

Currently, a single dropped ping may result in a power state change. This can lead to unexpected results for automations based on device power state. E.g., turning another device on / off based on the power state of a ping-monitored device.

A parameter such as MinimumPingFailures could be added and used to satisfy an "off" state change. Default could be 1 to match current functionality. The state change would not take place until the minimum was reached.

The same evaluation would not be necessary when changing to an "on" state.

[dnicolson]

This would complement #506 nicely.

[wsc96]

This would be great. I have a couple of devices (TVs) that flap on/off and I'm assuming this happen because they are randomly not responding to a single ping.