Add YAML support to kolla_set_configs engine

Following the PTG agreement, this commit extends the container
configuration engine (set_configs.py) to support YAML format while
maintaining backward compatibility with JSON.

- Integrated 'yaml' library as a universal parser for both JSON
  and YAML formats (YAML is a superset of JSON)
- Updated 'load_config' to search for 'config.json', 'config.yaml'
- Added 'python3-yaml' (Debian) and 'python3-pyyaml' (RHEL) as
  required base packages in Dockerfile.j2

This change improves configuration readability and allows for
easier maintenance while ensuring no breakage for existing
JSON-based deployments.

Change-Id: Icfb52b8f94e1036d5952b160c5921348d1427fda
Signed-off-by: Piotr Milewski <vurmil@gmail.com>

0 files changed, 0 insertions, 0 deletions