monitor: Add trust manager class

This class contains the trust groups, and is the interface
for asking if a sensor value can be trusted or not.

It will also start and stop timers on all sensors in the same
group as the timer in question whose trust value just changed.

This class will be used by the Fan class in the speed change
callback function to check if a sensor is trusted before
analyzing its value.

Change-Id: I134be095b6b5222f7bc0e457078cf01f75a36219
Signed-off-by: Matt Spinler <spinler@us.ibm.com>
2 files changed