[jdk8u-dev] RFR: 6986863: ProfileDeferralMgr throwing ConcurrentModificationException

[Jan Kratochvil]

It is needed in jdk8 as a prerequisite for JDK-8347377.
A testcase is included.
It is not a clean backport - source files are moved, copyright years update, original patch uses extra function getStandardProfileInputStream(), Anton Voznia hasn't implemented it by himself, he borrowed it from another patch https://bugs.openjdk.org/browse/JDK-8039271 and changed it a bit according to the requirements. He didn't include entire fix because it's redundant. 
This backport is authored by Anton Voznia, I am only submitting it. Anton Voznia is an Azul employee so he should be covered by Azul OCA. Anton Voznia has not signed a personal OCA from Oracle.
It requires https://github.com/openjdk/jdk8u-dev/pull/690 as a prerequisite.

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Depends on: https://git.openjdk.org/jdk8u-dev/pull/690

Commit messages:
 - 6986863: ProfileDeferralMgr throwing ConcurrentModificationException

Changes: https://git.openjdk.org/jdk8u-dev/pull/691/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk8u-dev&pr=691&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-6986863
  Stats: 387 lines in 7 files changed: 204 ins; 115 del; 68 mod
  Patch: https://git.openjdk.org/jdk8u-dev/pull/691.diff
  Fetch: git fetch https://git.openjdk.org/jdk8u-dev.git pull/691/head:pull/691

PR: https://git.openjdk.org/jdk8u-dev/pull/691