AVRO-3005: Test decoding of long strings (#1101)
AVRO-3005: Test decoding of long strings (#1101)

Adds a unit test to check that decoding of strings of length > 256
works.

Co-authored-by: l.heimberg <d0e38a4349cb6bcd6235054d94843d03194c698a@cid.com>
apache/avro,apache/avro,apache/avro,apache/avro,apache/avro,apache/avro,apache/avro,apache/avro,apache/avro,apache/avro,apache/avro,apache/avro