v5.3.8 - AAP and curationdomains deprecation release

What's Changed

• Refactoring before deprecating AAP by @dipayan1985 in #735
• Remove support for curation domains by @dipayan1985 in #737
• Chore/21 biosamples aap auth support deprecation by @dipayan1985 in #736
• AAP deprecation final changes, SRA accession related changed for NCBI… by @dipayan1985 in #740
• better integration test by @dipayan1985 in #741
• BSD release 5.3.8 by @dipayan1985 in #742

Full Changelog: v5.3.7...v5.3.8