[lworld] RFR: Merge jdk

[David Simms]

Merge tag 'jdk-16+15'

-------------

Commit messages:
 - Merge message
 - Merge tag 'jdk-16+15' into lworld_merge_jdk_16_15
 - 8250217: com.sun.tools.javac.api.JavacTaskImpl swallows compiler exceptions potentially producing false positive test results
 - 8252957: Wrong comment in CgroupV1Subsystem::cpu_quota
 - 8248532: Every time I change keyboard language at my MacBook, Java crashes
 - 8252794: Creation of JNIMethodBlock should be done with a leaf lock
 - 8235229: Compilation against a modular, multi-release JAR erroneous with --release
 - 8240751: Shenandoah: fold ShenandoahTracer definition
 - 8250840: some tests use --enable-preview unnecessarily
 - 8252916: Newline in object field values list of ScopeDesc should be removed
 - ... and 57 more: https://git.openjdk.java.net/valhalla/compare/803d0d34...183f1cc7

The webrevs contain the adjustments done while merging with regards to each parent branch:
 - lworld: https://webrevs.openjdk.java.net/?repo=valhalla&pr=183&range=00.0
 - jdk: https://webrevs.openjdk.java.net/?repo=valhalla&pr=183&range=00.1

Changes: https://git.openjdk.java.net/valhalla/pull/183/files
  Stats: 9216 lines in 362 files changed: 7086 ins; 885 del; 1245 mod
  Patch: https://git.openjdk.java.net/valhalla/pull/183.diff
  Fetch: git fetch https://git.openjdk.java.net/valhalla pull/183/head:pull/183

PR: https://git.openjdk.java.net/valhalla/pull/183