Add lowercase version of tests.leavetemporary to propagated properties.

git-svn-id: https://svn.apache.org/repos/asf/lucene/dev/branches/branch_4x@1585064 13f79535-47bb-0310-9956-ffa450edef68
Don't run this test if temporary folders are left behind.

git-svn-id: https://svn.apache.org/repos/asf/lucene/dev/branches/branch_4x@1585068 13f79535-47bb-0310-9956-ffa450edef68