Integrated: 8280028: [BACKOUT] Parallel: More precise boundary in ObjectStartArray::object_starts_in_range

[Albert Mingkun Yang]

Reverting a commit to solve failures on tier3.

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Commit messages:
 - Revert "8279699: Parallel: More precise boundary in ObjectStartArray::object_starts_in_range"

Changes: https://git.openjdk.java.net/jdk/pull/7089/files
 Webrev: https://webrevs.openjdk.java.net/?repo=jdk&pr=7089&range=00
  Issue: https://bugs.openjdk.java.net/browse/JDK-8280028
  Stats: 7 lines in 2 files changed: 0 ins; 2 del; 5 mod
  Patch: https://git.openjdk.java.net/jdk/pull/7089.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk pull/7089/head:pull/7089

PR: https://git.openjdk.java.net/jdk/pull/7089