RFR: 8295427: popframe004: report more details on error

[Alex Menkov]

Failures of the test are usually caused by unexpected frame in the stack.
Also the failures are intermittent, so it makes sense to report more details on error to simplify analysis.
The fix adds stack trace printing if the test fails

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Commit messages:
 - print stack trace on error

Changes: https://git.openjdk.org/jdk/pull/10733/files
 Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=10733&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8295427
  Stats: 77 lines in 1 file changed: 72 ins; 0 del; 5 mod
  Patch: https://git.openjdk.org/jdk/pull/10733.diff
  Fetch: git fetch https://git.openjdk.org/jdk pull/10733/head:pull/10733

PR: https://git.openjdk.org/jdk/pull/10733