Prior file initialises on loading giving misinformed message

The prior is now saved in the data_dump and loaded in the analysis.

When this happens, a message

14:57 bilby_pipe INFO    : Sampling seed set to 757826
14:57 bilby INFO    : No prior given, using default BBH priors in /home/gregory.ashton/anaconda3/envs/bilby-master/lib/python3.7/site-packages/bilby/gw/prior_files/binary_black_holes.prior.

Is printed which suggests the prior isn't being initialised correctly. However, if one then looks at the log messages search parameters: it shows the correct prior is being loaded.

I think this is just an initialisation issue, but it would be good to resolve.