test/gw/source_test.py: add test for binary_black_hole_frequency_sequence and binary_neutron_star_frequency_sequence

Ethan Payne authored 4 years ago and Moritz Huebner committed 4 years ago

removed the likelihood matrix calculation within the likelihood function, and instead use a loop in the post-processing script

There seems to be an issue with colorbars in matplotlib 3.3.0.
As this code is not reguarly used, I'm removing it from testing to avoid
breaking scheduled tests.