revert vars

playbooks/ec2.ini

 [ec2]
 regions=all
 destination_variable=public_dns_name
-vpc_destination_variable=private_ip_address
+vpc_destination_variable=private_dns_name
 cache_path=/tmp
 cache_max_age=300

playbooks/group_vars/all

@@ -7,7 +7,7 @@ os_name: ubuntu
 
 # these pathes are relative to the playbook dir
 # directory for secret settings (keys, etc)
-secure_dir: '../../edx-secret'
+secure_dir: 'secure_example'
 
 # this indicates the path to site-specific (with precedence)
 # things like nginx template files