COMP: Fix build with Python3

Change-Id: If4e5b1092eba2b5c6c052f0df410c1557485f936
ENH: Add CTestConfig.cmake.

So dashboard builds know where to upload their results.

Change-Id: I7fdafd90a6ac7cbeb3b46f26043517fd6bdb849c
Merge "COMP: Fix build with Python3"
Merge "ENH: Add CTestConfig.cmake."