Small changes to the Catalyst adaptor API.

Added in a method to allow simulation codes to easily
add in multiple Python script pipelines through the C
and Fortran adaptor API.

Change-Id: I0411b0f189625f77765c0ab940da0b0e4ae63693
Merge topic '13976_api_for_extra_catalyst_scripts' into next

60c2fb1 Small changes to the Catalyst adaptor API.