git: openjdk/jdk17u-dev: 8316693: Simplify at-requires checkDockerSupport()

[Goetz Lindenmaier]

Changeset: 2470cace
Author:    Goetz Lindenmaier <goetz at openjdk.org>
Date:      2024-01-08 09:15:31 +0000
URL:       https://git.openjdk.org/jdk17u-dev/commit/2470cace0dc5a9ac68fdfbf230447feec8e3db0b

8316693: Simplify at-requires checkDockerSupport()

Backport-of: 16fd43c5eb0fb18e93f00b5817d368df5afad969

! test/jtreg-ext/requires/VMProps.java