do not propogate __ variables when config chain loading

Currently, there is no way to hide variables when chain loading config files and these variables could affect the command behavior or other config files.

changed milestone to %Bob 9.0.0

changed milestone to %Bob 9.0.0

moved from bob.pipelines#13 (moved)

changed the description

changed title from do not propogate _ variables when config chain loading to do not propogate __ variables when config chain loading

mentioned in commit 1b7eb9d4

mentioned in merge request !137 (merged)

mentioned in commit fa95a4ed

closed with commit 1b7eb9d4

closed with merge request !137 (merged)