Exactly what I needed

This does exactly what I needed and works for models 5548 and N2048.

I did come across an issue when a switch is in a stack. The fan temps check does not calculate the proper exit status. Here is my diff for the changes I added to fix this:

212a213
> if [ $TEMPS_EXIT_STATUS -lt ‘2’ ]; then
213a215,217
> else
> TEMPS_EXIT_STATUS=2
> fi
215a220
> if [ $TEMPS_EXIT_STATUS -lt ‘1’ ]; then
216a222
>

The only other thing I see that would make this more awesome, is to add the global status health check. There is another module on the exchange that does and I may add it to this one. It uses the productStatusGlobalStatus mib. It may be redundant to check the fans, temp, psus AND health, but in certain places, a simple health check may be sufficient.