Culling default values from generated scripts.

Both the temporal parallelism and co-processing generated scripts
should have default values culled. This makes the script more
readable as well as more robust with respect to changes to the
Python API. Note that the culling is controlled through the
settins in the GUI.

Change-Id: I6961fe3148b10194de99a72465567d1efedab00a
Forward VTK to gerrit/master

Change-Id: I437c48bea8819077230fe35019fb17d9f028cbcb
Merge topic 'forward-to-vtk-master' into next

b16d5cb Forward VTK to gerrit/master
Merge topic '10965_cull_default_values' into next

910b898 Culling default values from generated scripts.