Fix SoftLayer CPUs and DNS

(c) Copyright IBM Corp. 2015

examples/make-deploy/softlayer.makefile

 # Copyright (c) Jupyter Development Team.
 # Distributed under the terms of the Modified BSD License.
 
-softlayer-vm: export SOFTLAYER_CPUS?=4
+softlayer-vm: export SOFTLAYER_CPU?=4
 softlayer-vm: export SOFTLAYER_DISK_SIZE?=100
 softlayer-vm: export SOFTLAYER_MEMORY?=4096
 softlayer-vm: export SOFTLAYER_REGION?=wdc01
@@ -17,11 +17,10 @@ softlayer-vm: check
 	@docker-machine create -d softlayer $(NAME)
 	@echo "DONE: Docker host '$(NAME)' up at $$(docker-machine ip $(NAME))"
 
-softlayer-dns: HOST_NAME:=$$(docker-machine ip $$(docker-machine active))
+softlayer-dns: HOST_NAME:=$$(docker-machine active)
+softlayer-dns: IP:=$$(docker-machine ip $(HOST_NAME))
 softlayer-dns: check
 	@which slcli > /dev/null || (echo "softlayer cli not found (pip install softlayer)"; exit 1)
-	@test -n "$(NAME)" || \
-		(echo "ERROR: NAME not defined (make help)"; exit 1)
 	@test -n "$(SOFTLAYER_DOMAIN)" || \
 		(echo "ERROR: SOFTLAYER_DOMAIN not defined (make help)"; exit 1)
-	@slcli dns record-add $(SOFTLAYER_DOMAIN) $(HOST_NAME) A $(HOST_NAME)
+	@slcli dns record-add $(SOFTLAYER_DOMAIN) $(HOST_NAME) A $(IP)