Merge branch '8784-dir-listings'

refs #8784

Arvados-DCO-1.1-Signed-off-by: Tom Clegg <tom@curoverse.com>

diff --cc apps/workbench/app/controllers/collections_controller.rb
Simple merge

diff --cc apps/workbench/test/integration/collection_upload_test.rb
Simple merge

diff --cc apps/workbench/test/integration/download_test.rb
Simple merge

diff --cc sdk/python/tests/run_test_server.py
Simple merge