[12gevmoller_sim] [EXTERNAL] [JeffersonLab/remoll] 54ea99: 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=goJwWHMSw0m0T0VZxLZBEcgvkdUp82vLBYEwlV3ul_qzddHbZIlk8L2ArDnZo0u5&s=ANIiO4XMHIV6pp3R2sg6eY8Lw3wwN6ibJCvNMLA5V0o&e= 
  Commit: 54ea993cbc71e51942f94f50a5320ed42cab32ee
      https://urldefense.proofpoint.com/v2/url?u=https-3A__github.com_JeffersonLab_remoll_commit_54ea993cbc71e51942f94f50a5320ed42cab32ee&d=DwICaQ&c=CJqEzB1piLOyyvZjb8YUQw&r=-0uahHXTLsQsllHBZNHgOynLaY6DUxqehsUJ91-BlNY&m=goJwWHMSw0m0T0VZxLZBEcgvkdUp82vLBYEwlV3ul_qzddHbZIlk8L2ArDnZo0u5&s=Vti4w1eIKuFwO8QLWvH9UvIa5FU1j6_GZoIDCVQZxvg&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>