allow for prepared batch statements
allow for prepared batch statements

There is no reason to choose between batch and prepared statements.
A batch statement containing prepared statements is 100% valid. Surprisingly,
the code just works in this scenario. All we have to do is get rid of the test.

Signed-off-by: Glauber Costa <7ba9037b0dd006f9408bd45b94707becd5cd4e87@scylladb.com>

scylladb/scylla-tools-java,scylladb/scylla-tools-java,scylladb/scylla-tools-java,scylladb/scylla-tools-java