Allow customization of helm charts repos

Added default variables to customize the repo name to download
the chart testing helm chart and config files

Change-Id: I37f8db66bdfef7d64e59a89ca8d99b12f95c1be2

roles/ensure-chart-testing/README.rst

@@ -4,4 +4,14 @@ Ensure chart-testing is installed
 
 .. zuul:rolevar:: chart_testing_version
 
-   Version of chart-testing to install
+   Version of chart-testing to install.
+
+.. zuul:rolevar:: ensure_chart_testing_repo_name_helm_chart
+   :default: https://github.com/helm/chart-testing/releases/download
+
+   The root location to get the chart testing helm chart.
+
+.. zuul:rolevar:: ensure_chart_testing_repo_name_config
+   :default: https://raw.githubusercontent.com/helm/chart-testing
+
+   The root location to get the chart testing configuration files.

roles/ensure-chart-testing/defaults/main.yaml

@@ -1,2 +1,4 @@
 ---
 chart_testing_version: 2.4.0
+ensure_chart_testing_repo_name_helm_chart: "https://github.com/helm/chart-testing/releases/download"
+ensure_chart_testing_repo_name_config: "https://raw.githubusercontent.com/helm/chart-testing"

roles/ensure-chart-testing/tasks/main.yaml

@@ -14,7 +14,7 @@
   become: true
   unarchive:
     remote_src: true
-    src: "https://github.com/helm/chart-testing/releases/download/v{{ chart_testing_version }}/chart-testing_{{ chart_testing_version }}_linux_amd64.tar.gz"
+    src: "{{ ensure_chart_testing_repo_name_helm_chart }}/v{{ chart_testing_version }}/chart-testing_{{ chart_testing_version }}_linux_amd64.tar.gz"
     dest: /usr/local/bin
 
 - name: Setup /etc/ct
@@ -27,7 +27,7 @@
 - name: Install configuration files
   become: true
   get_url:
-    url: "https://raw.githubusercontent.com/helm/chart-testing/v{{ chart_testing_version }}/etc/{{ zj_item }}"
+    url: "{{ ensure_chart_testing_repo_name_config }}/v{{ chart_testing_version }}/etc/{{ zj_item }}"
     dest: "/etc/ct/{{ zj_item }}"
   loop:
   - chart_schema.yaml