Add support for etc and ext folders in gvm bash env builder.
Add archive and tmp folder support gvm bash env builder. Refactor base folder name.
Some integration tweaks for selfupdate steps with new bash env builder.
Remove obsolete code from env.groovy. Replaced by bash env builder.
Integrate bash env builder with cucumber step defs.
Fixed obscure broadcast flushing bug exposed by new test infrastructure.
Removed obsolete baseEnv field from builder.