[GRASS-git] [OSGeo/grass] b62173: Fix grass-session installation in docker files (#517)

[Markus Neteler]

  Branch: refs/heads/releasebranch_7_8
  Home:   https://github.com/OSGeo/grass
  Commit: b6217339840252eec94c6df87ce76da11d4e9da8
      https://github.com/OSGeo/grass/commit/b6217339840252eec94c6df87ce76da11d4e9da8
  Author: Markus Neteler <neteler at gmail.com>
  Date:   2020-04-16 (Thu, 16 Apr 2020)

  Changed paths:
    M docker/alpine/Dockerfile_alpine_wxgui
    M docker/debian/Dockerfile_debian_pdal
    M docker/ubuntu/Dockerfile_ubuntu_latest_pdal
    M docker/ubuntu/Dockerfile_ubuntu_pdal

  Log Message:
  -----------
  Fix grass-session installation in docker files (#517)

Due to https://github.com/zarch/grass-session/issues/16 all docker builds are currently broken.
This workaround pins the last working version by applying the workaround used in https://github.com/OSGeo/grass/pull/516

To be removed once `grass-session` is back functional.