(PUP-9319) Use remote environment for puppet device

This commit uses a "remote" environment, instead of a full one. This
allows the override to work, even if we do not have that environment's
codedir available locally.

In the case of a full puppet run, the `Configurer` does additional work
to update and sync the plugindir vs what the ENC specifies.

# Conflicts:
#	spec/unit/application/device_spec.rb

Author: DavidS

lib/puppet/application/device.rb

@@ -237,7 +237,7 @@ def main
     confdir = Puppet[:confdir]
     certname = Puppet[:certname]
 
-    env = Puppet.lookup(:environments).get(Puppet[:environment])
+    env = Puppet::Node::Environment.remote(Puppet[:environment])
     returns = Puppet.override(:current_environment => env, :loaders => Puppet::Pops::Loaders.new(env)) do
       # find device list
       require 'puppet/util/network_device/config'