5.2.9 software release

What's Changed

• Don't fetch un-curated view while checking if sample exists by @dipayan1985 in #579
• BSD-2229 and BSD-2231 by @dipayan1985 in #580
• Fix return type of V2 bulk retrieval client methods, from EntityModel… by @dipayan1985 in #581
• Add single sample fetch in V2 by @dipayan1985 in #582
• Integration test fix by @dipayan1985 in #583
• BSD Release 5.2.9 by @dipayan1985 in #584

Full Changelog: v5.2.8...v5.2.9