Polishing: fix a number of compiler warnings reported by Eclipse

spring-boot-tools/spring-boot-configuration-processor/src/test/java/org/springframework/boot/configurationsample/lombok/LombokSimpleDataProperties.java

@@ -30,6 +30,7 @@ import lombok.Data;
  */
 @Data
 @ConfigurationProperties(prefix = "data")
+@SuppressWarnings("unused")
 public class LombokSimpleDataProperties {
 
 	private final String id = "super-id";

spring-boot-tools/spring-boot-configuration-processor/src/test/java/org/springframework/boot/configurationsample/lombok/LombokSimpleProperties.java

@@ -32,6 +32,7 @@ import lombok.Setter;
 @Getter
 @Setter
 @ConfigurationProperties(prefix = "simple")
+@SuppressWarnings("unused")
 public class LombokSimpleProperties {
 
 	private final String id = "super-id";