ansible: fix Jenkins icon download

Download the Jenkins icon from our own CI server to avoid failure due to
redirects.

Author: richardlau

ansible/group_vars/release.yml

@@ -1,6 +1,7 @@
 jenkins_url: "https://ci-release.nodejs.org"
 # intentionally fetching `slave.jar` from ci.nodejs.org to avoid auth problems
 jenkins_worker_jar: "https://ci.nodejs.org/jnlpJars/slave.jar"
+jenkins_icon: "https://ci.nodejs.org/favicon.ico"
 server_user: "iojs"
 home: "/home"
 git_reference_path: "{{ home }}/{{ server_user }}/.ccache/node.shared.reference"

ansible/group_vars/test.yml

@@ -1,5 +1,6 @@
 jenkins_url: "https://ci.nodejs.org"
 jenkins_worker_jar: "{{ jenkins_url }}/jnlpJars/slave.jar"
+jenkins_icon: "{{ jenkins_url }}/favicon.ico"
 server_user: iojs
 home: "/home"
 git_reference_path: "{{ home }}/{{ server_user }}/git/io.js.reference"

ansible/roles/jenkins-worker-windows/tasks/main.yml

@@ -9,7 +9,7 @@
 
 - name: download Jenkins icon
   win_get_url:
-    url: 'http://mirrors.jenkins-ci.org/art/jenkins-logo/favicon.ico'
+    url: '{{ jenkins_icon }}'
     dest: 'C:\jenkins.ico'
     force: no