[Pkg-salt-team] Bug#921630: salt-common: Python DeprecationWarning when using platform.linux_distribution in Python 3.5+

[Malcolm Acker]

Package: salt-common
Version: 2018.3.3+dfsg1-2
Severity: normal

Dear Maintainer,

The following error messages are printed to console/log and causes issues with OS-level targeting via grains:

    2019-02-07 07:34:10,823 [py.warnings      :110 ][WARNING ][1645] /usr/lib/python3/dist-packages/salt/loader.py:741: DeprecationWarning: dist() and linux_distribution() functions are deprecated in Python 3.5
      ret = funcs[key]()

    2019-02-07 07:34:10,884 [py.warnings      :110 ][WARNING ][1645] /usr/lib/python3/dist-packages/salt/grains/core.py:1756: DeprecationWarning: dist() and linux_distribution() functions are deprecated in Python 3.5
      linux_distribution(supported_dists=_supported_dists)]

This is solved upstream in the following merge request:
- https://github.com/saltstack/salt/pull/50822/

This fix requires an additional package dependency: python3-distro

-- System Information:
Debian Release: buster/sid
  APT prefers testing
  APT policy: (500, 'testing')
Architecture: amd64 (x86_64)

Kernel: Linux 4.19.0-2-amd64 (SMP w/1 CPU core)
Kernel taint flags: TAINT_BAD_PAGE, TAINT_DIE
Locale: LANG=en_US.UTF-8, LC_CTYPE=en_US.UTF-8 (charmap=UTF-8), LANGUAGE=en_US.UTF-8 (charmap=UTF-8)
Shell: /bin/sh linked to /usr/bin/dash
Init: systemd (via /run/systemd/system)

Versions of packages salt-common depends on:
ii  python3                3.7.2-1
ii  python3-apt            1.8.3
ii  python3-dateutil       2.6.1-1
ii  python3-jinja2         2.10-1
ii  python3-msgpack        0.5.6-1+b1
ii  python3-pkg-resources  40.6.3-1
ii  python3-psutil         5.5.0-1
ii  python3-requests       2.20.0-2
ii  python3-tornado        5.1.1-4
ii  python3-tornado4       4.5.3-3
ii  python3-yaml           3.13-2

Versions of packages salt-common recommends:
ii  lsb-release       10.2018112800
ii  python3-croniter  0.3.24-2

Versions of packages salt-common suggests:
pn  python3-mako  <none>
pn  salt-doc      <none>

-- no debconf information