Improve SimpleStreamingClientHttpRequest performance

Ensure that NonClosingOutputStream calls with a byte array call the
corresponding methods of the underlying OutputStream rather than
relying on the default NonClosingOutputStream implementation, which
writes one bte at a time. This significantly improves performance.

Issues: SPR-9530

spring-web/src/main/java/org/springframework/http/client/SimpleStreamingClientHttpRequest.java

 /*
- * Copyright 2002-2011 the original author or authors.
+ * Copyright 2002-2012 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -113,6 +113,16 @@ final class SimpleStreamingClientHttpRequest extends AbstractClientHttpRequest {
 			super(out);
 		}
 
+		@Override
+		public void write(byte[] b) throws IOException {
+			super.write(b);
+		}
+
+		@Override
+		public void write(byte[] b, int off, int let) throws IOException {
+			out.write(b, off, let);
+		}
+
 		@Override
 		public void close() throws IOException {
 		}