update the version of git used on corddev

Change-Id: I99d9613ea9cb40c4e78475c0f6286a4cfda46203
diff --git a/ansible/roles/buildtools/defaults/main.yml b/ansible/roles/buildtools/defaults/main.yml
index b7568df..201b49c 100644
--- a/ansible/roles/buildtools/defaults/main.yml
+++ b/ansible/roles/buildtools/defaults/main.yml
@@ -1,2 +1,3 @@
 apt_packages:
   - maven
+  - git