Created separate subclass of BasicCassandraMappingContext to create
overrides of CassandraPersistentProperty for
- Transients, Enums, URL, TimeZone, Locale, Currency, Calender.
- Integer type for byte and short properties as not supported by
Datastax driver and Cassandra
Created separate subclass of MappingCassandraConverter to handle futher
conversions required by GORM