RFR: 8280010: Remove double buffering of InputStream for Properties.load

[Sergey Bylokhov]

On Mon, 10 Jan 2022 20:46:36 GMT, Andrey Turbanov <duke at openjdk.java.net> wrote:

> `Properties.load` uses `java.util.Properties.LineReader`. LineReader already buffers input stream. Hence wrapping InputStream in BufferedInputStream is redundant.

The code change looks fine, but can you please check the actual performance impact, will the perf be the same after the change?

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PR: https://git.openjdk.java.net/jdk/pull/7021