Close file stream in test.

git-svn-id: https://svn.apache.org/repos/asf/commons/proper/collections/trunk@1635348 13f79535-47bb-0310-9956-ffa450edef68

src/test/java/org/apache/commons/collections4/AbstractObjectTest.java

@@ -297,7 +297,11 @@ public abstract class AbstractObjectTest extends BulkTest {
      */
     protected Object readExternalFormFromDisk(final String path) throws IOException, ClassNotFoundException {
         final FileInputStream stream = new FileInputStream(path);
-        return readExternalFormFromStream(stream);
+        try {
+            return readExternalFormFromStream(stream);
+        } finally {
+            stream.close();
+        }
     }
 
     /**