Debian: Remove user directive from docker-registry service

By removing:
User=docker-registry
the service now runs as user root which allows ansible to use the
registry without hitting permissions issues.

Test Plan:

Pass: Execute ansible playbook in Debian OS
Pass: Service is active (running) after ansible playbook

Story: 2009101
Task: 44419

Signed-off-by: Fabricio Henrique Ramos <fabriciohenrique.ramos@windriver.com>
Change-Id: I06f3b0ed19d60400630bd01d3ae115fe44b6582b

kubernetes/docker-distribution/debian/deb_patches/0004-Remove-User-directive-from-unit-file.patch

@@ -0,0 +1,30 @@
+From 1f52f7857bdfd54af3409f0dc4a56ed866582327 Mon Sep 17 00:00:00 2001
+From: Fabricio Henrique Ramos <fabriciohenrique.ramos@windriver.com>
+Date: Fri, 28 Jan 2022 16:31:00 -0300
+Subject: [PATCH] Remove User directive from unit file
+
+By removing:
+User=docker-registry
+the service now runs as user root which allows ansible to use the
+registry without hitting permissions issues.
+
+Signed-off-by: Fabricio Henrique Ramos <fabriciohenrique.ramos@windriver.com>
+---
+ debian/docker-registry.service | 1 -
+ 1 file changed, 1 deletion(-)
+
+diff --git a/debian/docker-registry.service b/debian/docker-registry.service
+index a2feaa6..a4652b3 100644
+--- a/debian/docker-registry.service
++++ b/debian/docker-registry.service
+@@ -3,7 +3,6 @@ Description=the Docker toolset to pack, ship, store, and deliver content
+ After=network.target
+ 
+ [Service]
+-User=docker-registry
+ Type=simple
+ Environment=REGISTRY_STORAGE_DELETE_ENABLED=true
+ ExecStart=/usr/bin/docker-registry serve /etc/docker-distribution/registry/config.yml
+-- 
+2.17.1
+

kubernetes/docker-distribution/debian/deb_patches/series

@@ -1,3 +1,4 @@
 0001-update-paths-and-service.patch
 0002-no-gecos.patch
 0003-Override-docker-registry-service.patch
+0004-Remove-User-directive-from-unit-file.patch