Will return items from common over STACKS_ENV with config.d

[lewismarshall]

Given the files below:

[root@17b26269e45a stacks]# head -8 ./config.d/playground-lewis.yaml

---
vpc_name: playground-lewis-vpc
etcd_instance_type: t2.small
compute_instance_type: t2.small
compute_pause_time: PT10S
var_lib_docker_size: 10
compute_data_volume_size: 2
dns_zone_name: aws-dsp-ci.notprod.homeoffice.gov.uk
[root@17b26269e45a stacks]# head -8 ./config.d/config.yaml

---
common:
  compute_min_instances: 3
  ssh_access_subnets:
  - 10.99.0.0/16
  dns_zone_name: dsp.notprod.homeoffice.gov.uk

You would expect that the settings in playground-lewis.yaml would take precedence, but they don't.

This is the case when specified as root config e.g. (config above):

[root@17b26269e45a stacks]# stacks config dns_zone_name
dsp.notprod.homeoffice.gov.uk

...or when specified as a specific environment e.g.:

[root@a3ce9872e1c2 stacks]# echo $STACKS_ENV
playground-lewis
[root@a3ce9872e1c2 stacks]# stacks config dns_zone_name
dsp.notprod.homeoffice.gov.uk
[root@a3ce9872e1c2 stacks]# head -9 config.d/playground-lewis.yaml

---
playground-lewis:
  vpc_name: playground-lewis-vpc
  etcd_instance_type: t2.small
  compute_instance_type: t2.small
  compute_pause_time: PT10S
  var_lib_docker_size: 10
  compute_data_volume_size: 2
  dns_zone_name: aws-dsp-ci.notprod.homeoffice.gov.uk