Upgrade to Cassandra 3.0.0

Upgrade Cassandra driver to 3.0

• Reduce driver dependency to cassandra-driver-core
• Add support for new data types: short and byte, see https://datastax-oss.atlassian.net/browse/JAVA-786
• Fix timestamp/date mixup, see https://datastax-oss.atlassian.net/browse/JAVA-404. getTimestamp returns Date and getDate returns Cassandra's com.datastax.driver.core.LocalDate
• Migrate deserialization to CodecRegistry using the default instance
• Specify QueryOptions with a zero schema refresh to skip background schema refresh and the required synchronization
• Support NettyOptions, mainly because the newer drivers add a sleep time on shutdown
• Simplify ColumnReader
• Use bigint as default CQL type for long properties (instead of counter) as counter columns are not supported by Spring Data Cassandra
• Remove log4j dependencies as they are not needed anymore