Exclude list processing is case insensitive

The CTS recently had a bug reported by a licensee. The bug was due to a duplicate test which only differed from the other testcase by the case of the test name. We added the duplicate test to the exclude list. However, since the exclude list processing appears to be case insensitive, both tests were excluded. There is no way to exclude only one of the tests.

We would like the exclude list processing to be changed to be case sensitive.