Merge pull request #22 from bobuhiro11/rm_ipv6_support

Add SERVICE_IP_VERSION=4 and IP_VERSION=4.

Author: bobuhiro11

controller/local.conf

@@ -16,6 +16,9 @@ SERVICE_PASSWORD=password
 SERVICE_TOKEN=password
 ADMIN_PASSWORD=password
 
+SERVICE_IP_VERSION=4
+IP_VERSION=4
+
 # If your stack get failed with error: "Could not determine host ip address.
 # See local.conf for suggestions on setting HOST_IP." Try to uncomment
 # this line to set the proper host IP.