Fix the use of the wrong class java.lang.reflect.Modifier

Author: nakamura-to

src/main/java/org/seasar/doma/internal/apt/meta/EntityPropertyNameCollector.java

@@ -17,11 +17,11 @@
 
 import static org.seasar.doma.internal.util.AssertionUtil.*;
 
-import java.lang.reflect.Modifier;
 import java.util.HashSet;
 import java.util.Set;
 
 import javax.annotation.processing.ProcessingEnvironment;
+import javax.lang.model.element.Modifier;
 import javax.lang.model.element.TypeElement;
 import javax.lang.model.element.VariableElement;
 import javax.lang.model.type.TypeKind;