local_class -> YADM_CLASS
local_system -> YADM_OS
local_host -> YADM_HOSTNAME
local_user -> YADM_USER
local_distro -> YADM_DISTRO
The new names match the names used for j2/esh templates.
This makes it possible to run e.g. "yadm -Y foo introspect repo
2>/dev/null" and get an empty output instead of getting the error
message about foo not being fully qualified.