config/v2_1: translator modifications to work in new location
config/v2_1: translator modifications to work in new location

The translator is now in a new location and should produce 2.1.0 configs
instead of 2.3.0-experimental configs.

ajeddeloh/ignition,ajeddeloh/ignition,ajeddeloh/ignition,coreos/ignition,coreos/ignition,coreos/ignition