SpringBoot Provide expiry and bufferLength configuration properties for configuring a distribution statistic

To enhance the 27477.

Comment From: polarbear567

Thanks for the PR. Before we consider this change we would need additional tests that exercise the code you've added. Can you please review?

No problem. I'm worried that my descriptions can't be accurately expressed. Can you review the comments?

Comment From: snicoll

No worries, I can polish as part of the merge. Can you please add some tests?

Comment From: polarbear567

No worries, I can polish as part of the merge. Can you please add some tests?

Sure. I'll add some tests in PropertiesMeterFilterTests.

Comment From: polarbear567

some tests have been added, please review.