Update lamp test to not show on menu for unimplemented hosts

[wd5gnr]

I got to thinking about the changes to the lamp test and realized that it really shouldn't show up for unimplemented hosts in the config menu. So the function now takes a 0 to test for implementation and a 1 to test lamps. Returns a 1 if implemented and a zero if it isn't or if it was asked to test lamps.

Sorry for spamming PRs ;-)