feat: configurable tracking image

templates/gitlab-ci-gcloud-vault.yml

@@ -8,7 +8,7 @@ variables:
 
 .gcp-base:
   services:
-    - name: "$CI_REGISTRY/to-be-continuous/tools/tracking:master"
+    - name: "$TBC_TRACKING_IMAGE"
       command: ["--service", "gcloud", "1.6.2" ]
     - name: "$CI_REGISTRY/to-be-continuous/tools/vault-secrets-provider:master"
       alias: "vault-secrets-provider"

templates/gitlab-ci-gcloud.yml

@@ -14,6 +14,9 @@
 # Floor, Boston, MA  02110-1301, USA.
 # =========================================================================================
 variables:
+  # variabilized tracking image
+  TBC_TRACKING_IMAGE: "$CI_REGISTRY/to-be-continuous/tools/tracking:master"
+
   # Default Docker image (can be overridden)
   GCP_CLI_IMAGE: "google/cloud-sdk:latest"
 
@@ -326,7 +329,7 @@ stages:
 .gcp-base:
   image: $GCP_CLI_IMAGE
   services:
-    - name: "$CI_REGISTRY/to-be-continuous/tools/tracking:master"
+    - name: "$TBC_TRACKING_IMAGE"
       command: ["--service", "gcloud", "1.6.2" ]
   before_script:
     - *gcp-scripts