The fixes here include:
*Fixing segfault when exporting a Catalyst script with a plot view.
*Fixing batch interactor issue (no need for interactors in batch
 or when using Catalyst).
The testing was improved with:
*Adding a full workflow Catalyst test that outputs images.
 Had issue where outputting a chart view caused ParaView to
 segfault and now adding in a test to prevent that from
 happening again. It also outputs 2 images to make sure that
 works as well (the other one is a 3D render view).
*The Catalyst tests that were run with pvpython as the driver were
 changed to use pvbatch instead which is more like how Catalyst
 is used.