[jdk8u-dev] RFR: 8265527: tools/javac/diags/CheckExamples.java fails after JDK-8078024 8u backport

[Peter Zhelezniakov]

This fix reverts some of the changes made to jtreg tests by the 8078024 backport. Changes to javac itself are not reverted.

The failing test checks error messages emitted by javac while compiling invalid code. The exact messages differ in JDKs 8 and 9, where 8078024 fix was backported from. So this fix updates the expected messages to match those issued by JDK8.

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Commit messages:
 - 8265527: tools/javac/diags/CheckExamples.java fails after JDK-8078024 8u backport

Changes: https://git.openjdk.org/jdk8u-dev/pull/146/files
 Webrev: https://webrevs.openjdk.org/?repo=jdk8u-dev&pr=146&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8265527
  Stats: 5 lines in 2 files changed: 1 ins; 1 del; 3 mod
  Patch: https://git.openjdk.org/jdk8u-dev/pull/146.diff
  Fetch: git fetch https://git.openjdk.org/jdk8u-dev pull/146/head:pull/146

PR: https://git.openjdk.org/jdk8u-dev/pull/146