Backwards compatibility tests are not actually running

We have several backwards compatibility tests checked in -
RollingUpgradeDUnitTest
RollingUpgrade2DUnitTest
ClientServerMiscBCDUnitTest

These tests are all parametered by the list of old versions to run against.

However, it looks like the code to get the list of old versions incorrectly just logs a message and continues on if it can't find a file called geodeOldVersionClasspaths.txt. That file does not exist and is not being generated as far is I can tell. The entire project - geode-old-versions, is completely empty.

The net effect is these tests don't actually run, because the list of parameters is an empty list.