[12gevmoller_sim] [EXTERNAL] [JeffersonLab/remoll] ec1e57: 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=6vG3Jde0lPlRxoJoZr-qMcitDhySOhWI2TmkCRWlF1VHrljiEUHU7XLFMcAKZ_iA&s=Pt5NWd1Z6J1ve_0EOzWt5W6lIGZ5j7GBiwRdV0bM9II&e= 
  Commit: ec1e5708d759f3c682e4d78d7c815c9e67409008
      https://urldefense.proofpoint.com/v2/url?u=https-3A__github.com_JeffersonLab_remoll_commit_ec1e5708d759f3c682e4d78d7c815c9e67409008&d=DwICaQ&c=CJqEzB1piLOyyvZjb8YUQw&r=-0uahHXTLsQsllHBZNHgOynLaY6DUxqehsUJ91-BlNY&m=6vG3Jde0lPlRxoJoZr-qMcitDhySOhWI2TmkCRWlF1VHrljiEUHU7XLFMcAKZ_iA&s=u-Sc4kqfgaM-YXI4iKHbKjzC8g2ORrjEFF9g0iTSCH8&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>