tree 9778c73d5c0a6e1464bd6ad968fedcf6c952cb19
parent 4e08156b0163861bf2e3bacdbfb5d22d94151a82
author Jonathan Doman <jonathan.doman@intel.com> 1669230882 -0800
committer Jonathan Doman <jonathan.doman@intel.com> 1670957337 -0800

Refactor singleton and filesystem path handling

- Remove singleton PostCodeDataHolder. It only contained a single int
  which could easily be held inside the main PostCode class instead.
- Simplify D-Bus match construction by using predefined
  PropertiesChanged rule.
- Remove unnecessary PostCode members which were just copies of const
  strings.
- Refactor some filesystem path construction/handling to simplify code.

Tested:
Rebooted host a few times and observed that correct POST code history is
still populated in Redfish.

Signed-off-by: Jonathan Doman <jonathan.doman@intel.com>
Change-Id: Ifd61751807da704eaf2a64dac34ca708fd28c872