springboot Migrate off deprecated Spring Data Cassandra API

Configure UserTypeResolver and CodecRegistry on MappingCassandraConverter. Configure on CassandraMappingContext only the simple type holder instead of custom conversions.

Applies only to Spring Data Cassandra 3.0 (Neumann Release Train).

Related ticket: https://jira.spring.io/browse/DATACASS-470

Comment From: snicoll

This change breaks other tests, @mp911de is looking at it.

Comment From: snicoll

Thanks for the follow-up @mp911de!