cql: Add test for null in IN list
cql: Add test for null in IN list

Added tests that check for error
when null or unset appears in a list
of IN values.

Signed-off-by: Jan Ciolek <b66a6f3989e26cb552db14b7ab163c3a50292e24@scylladb.com>

scylladb/scylla,scylladb/scylla,scylladb/scylla,scylladb/scylla