#1902 fix memory and beef up test that should have failed before memory testing.

git-svn-id: https://chaste.cs.ox.ac.uk/svn/chaste/trunk@18007 b5f69653-2bf5-0310-8201-b0dafb8e1405
Fix copyrights for r18003/#2022.

git-svn-id: https://chaste.cs.ox.ac.uk/svn/chaste/trunk@18009 b5f69653-2bf5-0310-8201-b0dafb8e1405