RFR: 7124710: interleaved RedefineClasses() and RetransformClasses() calls may have a problem

[Alex Menkov]

The problem is RedefineClasses does not update cached_class_bytes, so subsequent RetransformClasses gets obsolete class bytes (this are testcases 3-6 from the new test)

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Commit messages:
 - one more tab
 - tabs
 - Fixed cached_class_file

Changes: https://git.openjdk.org/jdk/pull/10032/files
 Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=10032&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-7124710
  Stats: 555 lines in 4 files changed: 539 ins; 8 del; 8 mod
  Patch: https://git.openjdk.org/jdk/pull/10032.diff
  Fetch: git fetch https://git.openjdk.org/jdk pull/10032/head:pull/10032

PR: https://git.openjdk.org/jdk/pull/10032