debian: Add and patch dh-python package

This is a transient work that enables us to progress Debian
integration. This work affects only Debian.

Sysinv loads stevedore plugins. The logic is based on the fact that
the source files are listed in SOURCES.txt which is included in the
egg. The package that provides a plugin is determined by parsing
entry_point and distribution data. Distribution data loads
information from SOURCES.txt.

dh-python is used during build and silently removes the file that
sysinv expects to be present.

Patch the package to keep the file.

Skip CentOS tests because this is a Debian only package.
Debian tests:
PASS: build python package, build non-package python
PASS: SOURCES.txt present in .egg-info in python package

Partial-Bug: https://bugs.launchpad.net/starlingx/+bug/1955648
Signed-off-by: Dan Voiculeasa <dan.voiculeasa@windriver.com>
Change-Id: Id45b1ba93f9ee88cc01a9cb1fb25527b8a5f1e19

debian_pkg_dirs

@@ -55,6 +55,7 @@ ostree/initramfs-ostree
 ostree/mttyexec
 ostree/ostree
 ostree/ostree-upgrade-mgr
+python/dh-python
 python/python3-setuptools
 security/keyrings.alt
 security/python-keyring

python/dh-python/debian/meta_data.yaml

@@ -0,0 +1,10 @@
+---
+debname: dh-python
+debver: 4.20201102+nmu1
+dl_path:
+  name: dh-python-4.20201102+nmu1.tar.gz
+  url: https://salsa.debian.org/python-team/tools/dh-python/-/archive/4.20201102+nmu1/dh-python-4.20201102+nmu1.tar.gz
+  md5sum: e8ffceb6618446cd57916d3063a326e3
+revision:
+  dist: $STX_DIST
+  PKG_GITREVCOUNT: true

python/dh-python/debian/patches/0001-Keep-SOURCES.txt.patch

@@ -0,0 +1,31 @@
+From a199540ebeb3be34ce8602f5977cdaf867c578d9 Mon Sep 17 00:00:00 2001
+From: Dan Voiculeasa <dan.voiculeasa@windriver.com>
+Date: Thu, 23 Dec 2021 15:00:17 +0200
+Subject: [PATCH] Keep SOURCES.txt
+
+Sysinv logic is based on the fact that the source files are listed
+in SOURCES.txt.
+
+Partial-Bug: https://bugs.launchpad.net/starlingx/+bug/1955648
+Signed-off-by: Dan Voiculeasa <dan.voiculeasa@windriver.com>
+---
+ dhpython/fs.py | 3 ---
+ 1 file changed, 3 deletions(-)
+
+diff --git a/dhpython/fs.py b/dhpython/fs.py
+index 08fd8a9..6d411e2 100644
+--- a/dhpython/fs.py
++++ b/dhpython/fs.py
+@@ -400,9 +400,6 @@ class Scan:
+                 self.result['requires.txt'].add(join(dpath, 'requires.txt'))
+             if 'namespace_packages.txt' in file_names:
+                 self.result['nsp.txt'].add(join(dpath, 'namespace_packages.txt'))
+-            if 'SOURCES.txt' in file_names:
+-                os.remove(join(dpath, 'SOURCES.txt'))
+-                file_names.remove('SOURCES.txt')
+ 
+     def is_egg_file(self, fpath):
+         """Check if given file contains egg-info."""
+-- 
+2.30.0
+

python/dh-python/debian/patches/series

@@ -0,0 +1 @@
+0001-Keep-SOURCES.txt.patch