RFR: 8279856: Parallel: Use PreservedMarks to record promotion-failed objects

[Albert Mingkun Yang]

Simple change of using `PreservedMarks` to skip young-gen walking in finding promotion-failed objs.

Test: tier1-6

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Commit messages:
 - parallel-promotion-failure

Changes: https://git.openjdk.java.net/jdk/pull/7028/files
 Webrev: https://webrevs.openjdk.java.net/?repo=jdk&pr=7028&range=00
  Issue: https://bugs.openjdk.java.net/browse/JDK-8279856
  Stats: 11 lines in 4 files changed: 7 ins; 3 del; 1 mod
  Patch: https://git.openjdk.java.net/jdk/pull/7028.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk pull/7028/head:pull/7028

PR: https://git.openjdk.java.net/jdk/pull/7028