Disabling the GR_RenderHook for Houdini 12.5 or later.
Newer versions of Houdini will use a GUI_PrimitiveHook (not included in the commit).
Fixing test for Houdini 12.5
Temporarily disabling bound test for live scenes.
Houdini 12.5 introduced a bug in the HoudiniScene::readBound calculation. They have implemented a recursive bound calculation for OBJ_SubNets, but are not correctly transforming the child bounds. We have informed them of the error and will re-enable the test if they fix the problem.
Merge pull request #54 from andrewkaufman/houdini12.5Compatibility

Houdini 12.5 Compatibility