Update git version installed in corddev VM

Change-Id: I6b4c4281a00412ff86c7a7fff2a059d6c4ceb203
(cherry picked from commit 894d42be3801728b91111678cae7064e3d83fb24)
diff --git a/ansible/roles/buildtools/defaults/main.yml b/ansible/roles/buildtools/defaults/main.yml
index 9cca96e..cd009a1 100644
--- a/ansible/roles/buildtools/defaults/main.yml
+++ b/ansible/roles/buildtools/defaults/main.yml
@@ -1,4 +1,4 @@
 apt_packages:
   - maven
-  - git=1:2.11*
+  - git=1:2.13*
   - libxml-xpath-perl