Test building images from a private repo

Author: m-bull

.github/workflows/stackhpc-container-image-build.yml

@@ -195,6 +195,8 @@ jobs:
           kayobe overcloud container image build $args
         env:
           KAYOBE_VAULT_PASSWORD: ${{ secrets.KAYOBE_VAULT_PASSWORD }}
+          GITHUB_USERNAME: "git"
+          GITHUB_TOKEN: ${{ secrets.STACKHPC_RELEASE_TRAIN_TOKEN }}
         if: inputs.overcloud
 
       - name: Copy overcloud container image build logs to output directory

etc/kayobe/kolla.yml

@@ -134,6 +134,10 @@ kolla_sources:
     type: git
     location: https://github.com/stackhpc/stackhpc-inspector-plugins.git
     reference: 1.3.0
+  keystone-base:
+    type: git
+    location: https://{{ lookup('env', 'GITHUB_USERNAME') }}:{{ lookup('env', 'GITHUB_TOKEN') }}@github.com/stackhpc/keystone-private.git
+    reference: yoga-2119646
   magnum-base:
     type: git
     location: https://github.com/stackhpc/magnum.git