SceneCache OBJ Parameter Reorganization

Users wanted the standard OBJ_Subnet and OBJ_Geometry parms accessible on the SceneCache nodes. This required reconfiguring the parm arrangement and messing about with PRM_Switcher folder order and visibility. The standard Transform folder remains hidden (since it doesn't do anything for theses nodes), but all other standard parms are now exposed, including the mantra render parms on the OBJ_SceneCacheGeometry.

The second commit (getIndirect) was done on advice from SideFx, and is apparently necessary for any node that sticks its own parameters before its base class parameters.