Update templates/external_node.rb.erb

The setting is called storeconfigs.
Precedence fix
fixes #2155 - add --push-facts arg to ENC scripts

Extends ENC to be able to upload facts for all hosts, replacing the old
push_facts.rb script and keeping comms logic in the same place.
Added headers to templated files
Revert "Use the RC repo for now"

Now that 1.1 is released there's no longer a reason to use the RC repo.

This reverts commit 4098163a8e03843d2e87698f6d310c4c8b26528b.