SpringBoot Upgrade to Spring Data 2021.2.0

Comment From: christophstrobl

Project Dependencies Spring Data 2021.2.0

• Cassandra Driver (com.datastax.oss:java-driver-bom): 4.14.1
• Couchbase Client (com.couchbase.client:java-client): 3.3.0
• Jedis (redis.clients:jedis): 3.8.0
• Lettuce (io.lettuce:lettuce-core): 6.1.8.RELEASE
• MongoDB (org.mongodb:mongodb-driver-core): 4.6.0
• Neo4j Driver (org.neo4j.driver:neo4j-java-driver): 4.4.5
• Spring LDAP (org.springframework.ldap:spring-ldap-core): 2.4.0