Fix Configuration processor test tangle

Move `Metadata` test class to fix a package tangle in the test code.

Fixes gh-8613

spring-boot-tools/spring-boot-configuration-processor/src/test/java/org/springframework/boot/configurationprocessor/ConfigurationMetadataAnnotationProcessorTests.java

@@ -34,6 +34,7 @@ import org.springframework.boot.configurationprocessor.metadata.ConfigurationMet
 import org.springframework.boot.configurationprocessor.metadata.ItemDeprecation;
 import org.springframework.boot.configurationprocessor.metadata.ItemHint;
 import org.springframework.boot.configurationprocessor.metadata.ItemMetadata;
+import org.springframework.boot.configurationprocessor.metadata.Metadata;
 import org.springframework.boot.configurationprocessor.metadata.TestJsonConverter;
 import org.springframework.boot.configurationsample.incremental.BarProperties;
 import org.springframework.boot.configurationsample.incremental.FooProperties;

spring-boot-tools/spring-boot-configuration-processor/src/test/java/org/springframework/boot/configurationprocessor/metadata/JsonMarshallerTests.java

@@ -24,8 +24,6 @@ import java.util.Collections;
 
 import org.junit.Test;
 
-import org.springframework.boot.configurationprocessor.Metadata;
-
 import static org.assertj.core.api.Assertions.assertThat;
 
 /**

spring-boot-tools/spring-boot-configuration-processor/src/test/java/org/springframework/boot/configurationprocessor/Metadata.java → spring-boot-tools/spring-boot-configuration-processor/src/test/java/org/springframework/boot/configurationprocessor/metadata/Metadata.java

@@ -14,7 +14,7 @@
  * limitations under the License.
  */
 
-package org.springframework.boot.configurationprocessor;
+package org.springframework.boot.configurationprocessor.metadata;
 
 import java.util.ArrayList;
 import java.util.Collections;
@@ -24,10 +24,6 @@ import java.util.Map;
 import org.assertj.core.api.Condition;
 import org.hamcrest.collection.IsMapContaining;
 
-import org.springframework.boot.configurationprocessor.metadata.ConfigurationMetadata;
-import org.springframework.boot.configurationprocessor.metadata.ItemDeprecation;
-import org.springframework.boot.configurationprocessor.metadata.ItemHint;
-import org.springframework.boot.configurationprocessor.metadata.ItemMetadata;
 import org.springframework.boot.configurationprocessor.metadata.ItemMetadata.ItemType;
 import org.springframework.util.ObjectUtils;