Move GraphQlArgumentBinderTests to correct package

Author: rstoyanchev

spring-graphql/src/test/java/org/springframework/graphql/data/method/annotation/support/GraphQlArgumentBinderTests.java renamed to spring-graphql/src/test/java/org/springframework/graphql/data/GraphQlArgumentBinderTests.java

@@ -14,7 +14,7 @@
  * limitations under the License.
  */
 
-package org.springframework.graphql.data.method.annotation.support;
+package org.springframework.graphql.data;
 
 import java.util.List;
 import java.util.Map;