Incorrect tree name

Tree names of newly generated trees are cbmsim instead of mpdsim. This is caused by directory config not being copied in the installation step.

created merge request !338 (merged) to address this issue

mentioned in merge request !338 (merged)

closed with merge request !338 (merged)

mentioned in issue #62 (closed)

changed milestone to %Unified development and work environment using cvmfs and alibuild

assigned to @busa