Major Description
The cpp/src/tests/Makefile.am runs python setup.py install on the needed python items for the tests. The cmake build does not - it tries to rely on setting paths to the proper locations in the source tree. The paths to the source tree don't work right, and compiled python files get out of date easily, resulting is false fails when the tests are run via cmake. The cmake build should run the same python setup that the autotools build does.