Created a middle-layer service and view to generate a Solicitation with Submitted Proposals
Solicitations have user-specified name, proposal-code prefix, and ProposalProcess. The rest of their data are drawn from the prod_Sem_25A.json
Solicitation config file.
Proposals have ScienceCategories and a single Author corresponding to one of the Users, and there are a user-specified number of them.
Along the way:
- Moved all Solicitation config files into middle_layer/config_files
- Moved get_middle_layer from common.test_helpers to common