fix #10564: graph traversal from plate run to well
allow deleting screen after deleting shared plate within
make it possible to delete wells without deleting their samples
ensure that there remains a bean named /Well
use proper constants instead of repeating strings
create test users with non-user default group
add integration test for #10564
Merge pull request #1430 from mtbc/wellsample-to-well-10564

fix #10564: include wells in plate run processing