Replace NodeConfigIdentifiers with DeployIdentifier

Replace NodeConfigIdentifiers with DeployIdentifier

We added NodeConfigIdentifiers to trigger config to be re-applied on
update, but then later added DeployIdentifier which forces config to
*always* be applied on update, so we can simplify things by just
referencing the DeployIdentifier directly.

Change-Id: I79212def1936740825b714419dcb4952bc586a39