RFR: 8268288: jdk/jfr/api/consumer/streaming/TestOutOfProcessMigration.java fails with "Error: ShouldNotReachHere()"

[Calvin Cheung]

A small fix to ensure that the globally shared ClassPathImageEntry is not being deleted in CDS code.
The test failure is hard to reproduce. The proposed fix passed CI tiers 1-4 testing.
Currently running the TestOutOfProcessMigration.java test repeatedly on linux-x64 with the vm options in the bug report.

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

Commit messages:
 - 8268288: jdk/jfr/api/consumer/streaming/TestOutOfProcessMigration.java fails with "Error: ShouldNotReachHere()"

Changes: https://git.openjdk.java.net/jdk/pull/6651/files
 Webrev: https://webrevs.openjdk.java.net/?repo=jdk&pr=6651&range=00
  Issue: https://bugs.openjdk.java.net/browse/JDK-8268288
  Stats: 28 lines in 1 file changed: 11 ins; 11 del; 6 mod
  Patch: https://git.openjdk.java.net/jdk/pull/6651.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk pull/6651/head:pull/6651

PR: https://git.openjdk.java.net/jdk/pull/6651