Move DataFetcherExceptionResolver to execution

DataFetcherExceptionResolver and ErrorType are better in the
execution package next to where they're used.

graphql-spring-boot-starter/src/main/java/org/springframework/graphql/boot/GraphQLAutoConfiguration.java

@@ -28,7 +28,7 @@ import org.springframework.boot.context.properties.EnableConfigurationProperties
 import org.springframework.context.annotation.Bean;
 import org.springframework.context.annotation.Configuration;
 import org.springframework.core.io.ResourceLoader;
-import org.springframework.graphql.DataFetcherExceptionResolver;
+import org.springframework.graphql.execution.DataFetcherExceptionResolver;
 import org.springframework.graphql.execution.GraphQLSource;
 
 @Configuration

spring-graphql/src/main/java/org/springframework/graphql/execution/DataFetcherExceptionResolver.java

@@ -13,7 +13,7 @@
  * See the License for the specific language governing permissions and
  * limitations under the License.
  */
-package org.springframework.graphql;
+package org.springframework.graphql.execution;
 
 import java.util.List;
 

spring-graphql/src/main/java/org/springframework/graphql/execution/DefaultGraphQLSourceBuilder.java

@@ -33,7 +33,6 @@ import graphql.schema.idl.SchemaParser;
 import graphql.schema.idl.TypeDefinitionRegistry;
 
 import org.springframework.core.io.Resource;
-import org.springframework.graphql.DataFetcherExceptionResolver;
 import org.springframework.lang.Nullable;
 import org.springframework.util.Assert;
 

spring-graphql/src/main/java/org/springframework/graphql/execution/ErrorType.java

@@ -13,7 +13,7 @@
  * See the License for the specific language governing permissions and
  * limitations under the License.
  */
-package org.springframework.graphql;
+package org.springframework.graphql.execution;
 
 import graphql.ErrorClassification;
 

spring-graphql/src/main/java/org/springframework/graphql/execution/ExceptionResolversExceptionHandler.java

@@ -25,8 +25,6 @@ import graphql.execution.DataFetcherExceptionHandlerParameters;
 import graphql.execution.DataFetcherExceptionHandlerResult;
 import graphql.schema.DataFetchingEnvironment;
 
-import org.springframework.graphql.DataFetcherExceptionResolver;
-import org.springframework.graphql.ErrorType;
 import org.springframework.util.Assert;
 
 /**

spring-graphql/src/main/java/org/springframework/graphql/execution/GraphQLSource.java

@@ -27,7 +27,6 @@ import graphql.schema.idl.RuntimeWiring;
 import graphql.schema.idl.TypeDefinitionRegistry;
 
 import org.springframework.core.io.Resource;
-import org.springframework.graphql.DataFetcherExceptionResolver;
 
 /**
  * Strategy to resolve the {@link GraphQL} instance to use.

spring-graphql/src/test/java/org/springframework/graphql/execution/ExceptionResolversExceptionHandlerTests.java

@@ -31,8 +31,6 @@ import graphql.schema.idl.RuntimeWiring;
 import org.junit.jupiter.api.Test;
 
 import org.springframework.core.io.ByteArrayResource;
-import org.springframework.graphql.DataFetcherExceptionResolver;
-import org.springframework.graphql.ErrorType;
 import org.springframework.lang.Nullable;
 
 import static org.assertj.core.api.Assertions.assertThat;