As a result of https://bugs.openjdk.java.net/browse/JDK-8025673 -- which is resolved in JDK 8-b114 -- we are unable to run any tests that need headful AWT, such as our swing interop tests, as part of a Hudson build or using a remote shell. As a result we need to provide a way to disable the AWT-based tests so that we can continue to run the rest of the system tests with no failures.