[12gevmoller_sim] [EXTERNAL] [JeffersonLab/remoll] ededf1: add mini-lead wall present in config20

[cipriangal]

  Branch: refs/heads/feature-target-shield-design
  Home:   https://urldefense.proofpoint.com/v2/url?u=https-3A__github.com_JeffersonLab_remoll&d=DwICaQ&c=CJqEzB1piLOyyvZjb8YUQw&r=-0uahHXTLsQsllHBZNHgOynLaY6DUxqehsUJ91-BlNY&m=eMPHKDcJI5pA3Itrskz8FUF1Hv4y-_8FZ4zVpmRbeB9mXQKRPS-Uu-tcL8tFV-oC&s=kZpzKeXVuzqeqKi5eA9k8DU-biVj4ve3f9PE1Fv0GkQ&e= 
  Commit: ededf1b9e5704af94dca20af54a7109c27a5a3bd
      https://urldefense.proofpoint.com/v2/url?u=https-3A__github.com_JeffersonLab_remoll_commit_ededf1b9e5704af94dca20af54a7109c27a5a3bd&d=DwICaQ&c=CJqEzB1piLOyyvZjb8YUQw&r=-0uahHXTLsQsllHBZNHgOynLaY6DUxqehsUJ91-BlNY&m=eMPHKDcJI5pA3Itrskz8FUF1Hv4y-_8FZ4zVpmRbeB9mXQKRPS-Uu-tcL8tFV-oC&s=SHXpWVM6CQW248yuNc2Jzpg0EEO7givE29W1RGcihq0&e= 
  Author: cipriangal <cipriangal at users.noreply.github.com>
  Date:   2021-12-27 (Mon, 27 Dec 2021)

  Changed paths:
    M geometry/upstream/upstreamTorusRegion.gdml

  Log Message:
  -----------
  add mini-lead wall present in config20

Co-authored-by: Zuhal Seyma Demiroglu <zuhal.seyma.demiroglu at cern.ch>