INF-113 acme.sh LetsEncrypt certificate role

initial commit

Change-Id: I36f733306b439a0cd92bded0726dd53a0a4b4084
diff --git a/vars/Debian.yml b/vars/Debian.yml
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--- /dev/null
+++ b/vars/Debian.yml
@@ -0,0 +1,11 @@
+---
+# acme vars/Debian.yml
+#
+# SPDX-FileCopyrightText: © 2020 Open Networking Foundation <support@opennetworking.org>
+# SPDX-License-Identifier: Apache-2.0
+#
+# NOTE: Only put platform/OS-specific variables in this file.
+# Put all other variables in the 'defaults/main.yml' file.
+
+# shell used by the acme user (non-interactive)
+acmesh_shell: "/usr/sbin/nologin"