Deprecate Basic…Converter infrastructure.

Merge basic converters into Mapping…Converters and introduce deprecated variant to provide guidance for migration off the deprecated types.

Cleanup no longer required code.

spring-data-jdbc/src/main/java/org/springframework/data/jdbc/core/JdbcAggregateChangeExecutionContext.java

@@ -15,7 +15,16 @@
  */
 package org.springframework.data.jdbc.core;
 
-import java.util.*;
+import java.util.ArrayList;
+import java.util.Arrays;
+import java.util.Collections;
+import java.util.HashMap;
+import java.util.HashSet;
+import java.util.LinkedHashMap;
+import java.util.List;
+import java.util.Map;
+import java.util.Optional;
+import java.util.Set;
 import java.util.function.BiConsumer;
 import java.util.stream.Collectors;
 
@@ -33,7 +42,6 @@
 import org.springframework.data.relational.core.conversion.DbActionExecutionResult;
 import org.springframework.data.relational.core.conversion.IdValueSource;
 import org.springframework.data.relational.core.mapping.AggregatePath;
-import org.springframework.data.relational.core.mapping.PersistentPropertyPathExtension;
 import org.springframework.data.relational.core.mapping.RelationalMappingContext;
 import org.springframework.data.relational.core.mapping.RelationalPersistentEntity;
 import org.springframework.data.relational.core.mapping.RelationalPersistentProperty;
@@ -188,7 +196,8 @@ private Identifier getParentKeys(DbAction.WithDependingOn<?> action, JdbcConvert
 
 	private Object getParentId(DbAction.WithDependingOn<?> action) {
 
-		DbAction.WithEntity<?> idOwningAction = getIdOwningAction(action, context.getAggregatePath(action.getPropertyPath()).getIdDefiningParentPath());
+		DbAction.WithEntity<?> idOwningAction = getIdOwningAction(action,
+				context.getAggregatePath(action.getPropertyPath()).getIdDefiningParentPath());
 
 		return getPotentialGeneratedIdFrom(idOwningAction);
 	}