merge_yaml not doing deep copy

[Eduardo Gonzalez]

Merge_yaml module doesn't do a deep copy of >= first level properties, so it doesn't works for most configurations.

Example config:

global:
  resolve_timeout: 5m
  smtp_require_tls: true
  pagerduty_url: https://events.pagerduty.com/v2/enqueue
route:
  receiver: default-receiver
  group_wait: 10s
  group_interval: 5m
  repeat_interval: 3h
  routes:
    - match:
        severity: 'page'
      receiver: xxx-dc-default-receiver

receivers:
  - name: default-receiver
  - name: xxx-dc-default-receiver
    pagerduty_configs:
      - service_key: xxxx

templates: []

Default template:

global:
  resolve_timeout: 5m
  smtp_require_tls: true
route:
  receiver: default-receiver
  group_wait: 10s
  group_interval: 5m
  repeat_interval: 3h
receivers:
  - name: default-receiver
templates: []

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: master
Review: https://review.openstack.org/614296

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.openstack.org/614296
Committed: https://git.openstack.org/cgit/openstack/kolla-ansible/commit/?id=badb41a49c4b304bc525ba3fb997ef9288e3a6e9
Submitter: Zuul
Branch: master

commit badb41a49c4b304bc525ba3fb997ef9288e3a6e9
Author: Doug Szumski <email address hidden>
Date: Tue Oct 30 15:38:14 2018 +0000

    Support merging nested yaml config

    Closes-Bug: 1786741
    Change-Id: Ic217f3f8194cdcb5e28045e771a0160c1f12280e

[OpenStack Infra (hudson-openstack)]

This issue was fixed in the openstack/kolla-ansible 8.0.0.0b1 development milestone.