[jdk17u-dev] RFR: 8287352: DockerTestUtils::execute shows incorrect elapsed time

[Goetz Lindenmaier]

I backport this test change as it also goes to 17.0.17-oracle.

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Commit messages:
 - Backport ec97da93c1d5bfcb80c19c15169f41926e59517b

Changes: https://git.openjdk.org/jdk17u-dev/pull/3570/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk17u-dev&pr=3570&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8287352
  Stats: 13 lines in 1 file changed: 5 ins; 1 del; 7 mod
  Patch: https://git.openjdk.org/jdk17u-dev/pull/3570.diff
  Fetch: git fetch https://git.openjdk.org/jdk17u-dev.git pull/3570/head:pull/3570

PR: https://git.openjdk.org/jdk17u-dev/pull/3570