[GRASS-git] [OSGeo/grass] 4f2f21: Dockerfiles: update to grass-session v0.5

[Markus Neteler]

  Branch: refs/heads/releasebranch_7_8
  Home:   https://github.com/OSGeo/grass
  Commit: 4f2f21bf98ecff7d51312dff433edf6254d2a1aa
      https://github.com/OSGeo/grass/commit/4f2f21bf98ecff7d51312dff433edf6254d2a1aa
  Author: Markus <neteler at gmail.com>
  Date:   2020-04-18 (Sat, 18 Apr 2020)

  Changed paths:
    M docker/alpine/Dockerfile_alpine
    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:
  -----------
  Dockerfiles: update to grass-session v0.5

Backport of reverting grass-session workaround as no longer needed thanks to https://github.com/zarch/grass-session/releases/tag/v0.5