Release ironic-python-agent for stable/train

This release picks up new commits to ironic-python-agent since
the last release from stable/train.

This is being proposed as a convenience to help make sure stable
changes are being released. If the team is good with this going out,
please respond with a +1 to let the release team know it is OK to
proceed.

If it is not wanted at this time, or if there are more changes that
would be good to get merged before doing a  stable release, please
leave a -1 with a comment with what the team would prefer. We can
then either abandon this patch, or wait for an update with a new
commit hash to use instead.

Signed-off-by: Elod Illes <elod.illes@est.tech>
Change-Id: I8b49ce6792b2a92d1e0c5d54535993ecad93b2d8

deliverables/train/ironic-python-agent.yaml

@@ -31,6 +31,10 @@ releases:
     projects:
       - repo: openstack/ironic-python-agent
         hash: 46759750e0d34296c218a71c78cc7b60115693ef
+  - version: 5.0.4
+    projects:
+      - repo: openstack/ironic-python-agent
+        hash: 10059c535fe7b77d8d73918ca1316cfcc856b351
 branches:
   - location: 5.0.0
     name: stable/train