debian: Add missing /etc/etcd directory

When the node is bootstrapped via the ansible playbooks, the
client certs are stored in the /etc/etcd directory, which is
not created by the debian package. This causes the ansible
playbook to fail.

Create the /etc/etcd directory in the etc-server.postinst
script when the server is installed.

Testing:
PASS: Package installed and ISO built successfully

Story: 2009221
Task: 43521

Signed-off-by: Charles Short <charles.short@windriver.com>
Change-Id: I10fbf0bc34a0d65ec75ef9237f12cf63ce1b8c50

kubernetes/etcd/debian/deb_patches/0002-Add-etc-etcd-configuration-directory.patch

@@ -0,0 +1,28 @@
+From a5d54403cad886ff73a3051d6c3d2fb796e1f65b Mon Sep 17 00:00:00 2001
+From: Charles Short <charles.short@windriver.com>
+Date: Wed, 12 Jan 2022 11:42:20 -0500
+Subject: [PATCH] Add /etc/etcd configuration directory
+
+Ansible playbook expects an /etc/etcd directory so
+create one when the etcd-server is installed.
+
+Signed-off-by: Charles Short <charles.short@windriver.com>
+---
+ debian/etcd-server.postinst | 1 +
+ 1 file changed, 1 insertion(+)
+
+diff --git a/debian/etcd-server.postinst b/debian/etcd-server.postinst
+index 0bdc5c20..3ed3754e 100644
+--- a/debian/etcd-server.postinst
++++ b/debian/etcd-server.postinst
+@@ -8,6 +8,7 @@ case $1 in
+             adduser --system --group --disabled-login --disabled-password --home /var/lib/etcd/ etcd
+         fi
+         chmod 700 /var/lib/etcd/
++	 mkdir -m 755 -p /etc/etcd
+     ;;
+     abort-upgrade|abort-remove|abort-deconfigure)
+     ;;
+-- 
+2.25.1
+

kubernetes/etcd/debian/deb_patches/series

@@ -1 +1,2 @@
 0001-Update-config.patch
+0002-Add-etc-etcd-configuration-directory.patch