tests: teach controller.yml to configure git too

tests/ansible/gcloud/controller.yml

@@ -1,5 +1,9 @@
 
 - hosts: controller
+  vars:
+    git_username: '{{ lookup("pipe", "git config --global user.name") }}'
+    git_email: '{{ lookup("pipe", "git config --global user.email") }}'
+
   tasks:
     - lineinfile:
         line: "net.ipv4.ip_forward=1"
@@ -32,6 +36,11 @@
     - shell: "rsync -a ~/.ssh {{inventory_hostname}}:"
       connection: local
 
+    - shell: |
+        git config --global user.email "{{git_username}}"
+        git config --global user.name "{{git_email}}"
+      name: set_git_config
+
     - git:
         dest: ~/mitogen
         repo: https://github.com/dw/mitogen.git