RFR: 8261916: gtest/GTestWrapper.java vmErrorTest.unimplemented1_vm_asset failed

[Coleen Phillimore]

Some post-vm hooks were interfering with the gtests that expect exceptions to be thrown.  When running gtests, disable postVMInitHooks.
Tested with failing tests and configurations, and tier1 on linux-x64, linux-aarch64, macos-x64, windows-x64, and their -debug equivalents.

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

Commit messages:
 - 8261916: gtest/GTestWrapper.java vmErrorTest.unimplemented1_vm_assert failed

Changes: https://git.openjdk.java.net/jdk/pull/2884/files
 Webrev: https://webrevs.openjdk.java.net/?repo=jdk&pr=2884&range=00
  Issue: https://bugs.openjdk.java.net/browse/JDK-8261916
  Stats: 9 lines in 1 file changed: 3 ins; 0 del; 6 mod
  Patch: https://git.openjdk.java.net/jdk/pull/2884.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk pull/2884/head:pull/2884

PR: https://git.openjdk.java.net/jdk/pull/2884