Reduce default size of diagnostic buffer for `FlightRecorderInputStre…

…am` from 1MiB to 1KiB (#770)

* Reduce default size of diagnostic buffer for FlightRecorderInputStream from 1MiB to 1KiB

* Restore `final` modifier for BUFFER_SIZE

* Spotless

src/main/java/hudson/remoting/FlightRecorderInputStream.java

@@ -22,8 +22,7 @@ class FlightRecorderInputStream extends InputStream {
      * Size (in bytes) of the flight recorder ring buffer used for debugging remoting issues.
      * @since 2.41
      */
-    static final int BUFFER_SIZE =
-            Integer.getInteger("hudson.remoting.FlightRecorderInputStream.BUFFER_SIZE", 1024 * 1024);
+    static final int BUFFER_SIZE = Integer.getInteger("hudson.remoting.FlightRecorderInputStream.BUFFER_SIZE", 1024);
 
     private final InputStream source;
     private ByteArrayRingBuffer recorder = new ByteArrayRingBuffer(BUFFER_SIZE);