[#73151422] Added CmsMappings migration and model
Added placeholders for CMS api
renamed iucn.rake to external_apis.rake
Adding specs for cms_mapping
Firstly get all the CMS species and map them to our own species. Display in CMS mappings page
Adds details about the CMS species to the mapping
Changes to layout of cms_mappings page
Look at distributions but also instruments. and display on cms-mappings page
Updated details hash. Updated display for cms_mapping
Added download feature to CMS mappings page
Enabling two filters for the cms_mappings' index page
Merge branch 'cms_mapping' into develop