RFR: 8274794: Make Thread::_owned_locks available in product

[Coleen Phillimore]

Make thread owned locks available in product and change the error message printing to print by thread so that not only locks in mutexLocker are printed in the hs_err file.
Tested with tier1-3 and with product build, and tested hs_err files manually with some selected temporary ShouldNotReachHere, also new test.

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Commit messages:
 - Add test to print out locks in error file.
 - 8274794: Make Thread::_owned_locks available in product

Changes: https://git.openjdk.java.net/jdk/pull/5896/files
 Webrev: https://webrevs.openjdk.java.net/?repo=jdk&pr=5896&range=00
  Issue: https://bugs.openjdk.java.net/browse/JDK-8274794
  Stats: 317 lines in 10 files changed: 199 ins; 98 del; 20 mod
  Patch: https://git.openjdk.java.net/jdk/pull/5896.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk pull/5896/head:pull/5896

PR: https://git.openjdk.java.net/jdk/pull/5896