git: openjdk/jdk: 8298090: Use String.join() instead of manual loop in DescriptorSupport.toString

[Andrey Turbanov]

Changeset: d646e32b
Author:    Andrey Turbanov <aturbanov at openjdk.org>
Date:      2022-12-12 07:36:34 +0000
URL:       https://git.openjdk.org/jdk/commit/d646e32b7a0f8e4a66f06e15e289d4ed70b8250e

8298090: Use String.join() instead of manual loop in DescriptorSupport.toString

Reviewed-by: stsypanov, sspitsyn, lmesnik

! src/java.management/share/classes/javax/management/modelmbean/DescriptorSupport.java