CORD-2390 Add a retry to LXD connectivity check

Change-Id: Ie26986902d0bc0fb1bf37baae92cfebb8b8d1a1f
diff --git a/roles/lxd-finish/tasks/main.yml b/roles/lxd-finish/tasks/main.yml
index cd8359e..d7b7623 100644
--- a/roles/lxd-finish/tasks/main.yml
+++ b/roles/lxd-finish/tasks/main.yml
@@ -29,6 +29,10 @@
     ansible containers -u ubuntu
      -m uri
      -a "url=http://opencord.org validate_certs=no"
+  register: result
+  until: result|success
+  retries: 3
+  delay: 5
   tags:
     - skip_ansible_lint # connectivity check