[jdk11u-dev] RFR: 8315415: OutputAnalyzer.shouldMatchByLine() fails in some cases

[Andrew Lu]

I backport this for parity with 11.0.23-oracle.

-------------

Commit messages:
 - Backport 7b1e2bfe0f805a69b59839b6bf8250b62ea356b8

Changes: https://git.openjdk.org/jdk11u-dev/pull/2505/files
 Webrev: https://webrevs.openjdk.org/?repo=jdk11u-dev&pr=2505&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8315415
  Stats: 28 lines in 1 file changed: 0 ins; 0 del; 28 mod
  Patch: https://git.openjdk.org/jdk11u-dev/pull/2505.diff
  Fetch: git fetch https://git.openjdk.org/jdk11u-dev.git pull/2505/head:pull/2505

PR: https://git.openjdk.org/jdk11u-dev/pull/2505