Removed org.cassandraunit.utils.EmbeddedCassandraServerHelper in favor of official (and Apache 2.0) org.apache.cassandra.service.EmbeddedCassandraService.

Signed-off-by: Paulo Pires <pjpires@gmail.com>
Fixed XML formatting.

Signed-off-by: Paulo Pires <pjpires@gmail.com>
Removed notice about licensing issues.

Signed-off-by: Paulo Pires <pjpires@gmail.com>