generate ssh key pair

Change-Id: I9f7cbdb0ba9379eed262cc211a5eff2be5b05f8a
diff --git a/ansible/roles/docker-compose/tasks/main.yml b/ansible/roles/docker-compose/tasks/main.yml
index 3845f4a..41ed8cc 100644
--- a/ansible/roles/docker-compose/tasks/main.yml
+++ b/ansible/roles/docker-compose/tasks/main.yml
@@ -2,4 +2,4 @@
   get_url:
     url: https://github.com/docker/compose/releases/download/1.6.2/docker-compose-Linux-x86_64
     dest: /usr/local/bin/docker-compose
-    mode: 0755
+    mode: "0755"