Remove h from ESCAPED_CHARS in JsonMapObjectReaderWriter (#1872)

* Remove h from ESCAPED_CHARS in JsonMapObjectReaderWriter

Signed-off-by: Craig Perkins <cwperx@amazon.com>

* Change to n

Signed-off-by: Craig Perkins <cwperx@amazon.com>

---------

Signed-off-by: Craig Perkins <cwperx@amazon.com>
(cherry picked from commit 7dcafef)

rt/rs/extensions/json-basic/src/main/java/org/apache/cxf/jaxrs/json/basic/JsonMapObjectReaderWriter.java

@@ -49,7 +49,7 @@ public class JsonMapObjectReaderWriter {
         chars.add('/');
         chars.add('b');
         chars.add('f');
-        chars.add('h');
+        chars.add('n');
         chars.add('r');
         chars.add('t');
         ESCAPED_CHARS = Collections.unmodifiableSet(chars);