Added data fixtures
Use unknown port value for invalid port numbers
Merge branch 'feature/add_data_fixtures' into develop
Added missing voyage groupings to fixture
addes some documentation and refreshed user.json  file
Added database router for using legacy db
fixed fixtures
removed old load files and scripts
added Exception block
Fix conversion error in legacy sync script
Fix memory leak in sync legacy db
Fix incorrect number of voyages transferred
Fix paginator by sorting query
fixed image fixture by adding natural key to voyage model
added attributes to not export documents dir
Attempt fix to missing atl ports
Attempt fix of principal_place_of_slave_purchase missing values in solr
Re-add U.S.A. to imputed nationality list
Add Nationality fixture
Fix schema for missing imp_principal_port_slave_dis