RFR: 8248862: Implement Enhanced Pseudo-Random Number Generators [v9]

[Jim Laskey]

> This PR is to introduce a new random number API for the JDK. The primary API is found in RandomGenerator and RandomGeneratorFactory. Further description can be found in the JEP https://openjdk.java.net/jeps/356 .
> 
> javadoc can be found at http://cr.openjdk.java.net/~jlaskey/prng/doc/api/java.base/java/util/random/package-summary.html
> 
> old PR:  https://github.com/openjdk/jdk/pull/1273

Jim Laskey has updated the pull request with a new target base due to a merge or a rebase. The pull request now contains 34 commits:

 - Merge branch 'master' into 8248862
 - 8248862: Implement Enhanced Pseudo-Random Number Generators
   
   Added coverage testing
 - 8248862: Implement Enhanced Pseudo-Random Number Generators
   
   Cleanups from Chris H.
 - 8248862: Implement Enhanced Pseudo-Random Number Generators
   
   Propagate exception
 - 8248862: Implement Enhanced Pseudo-Random Number Generators
   
   Override AbstractSplittableGenerator
 - 8248862: Implement Enhanced Pseudo-Random Number Generators
   
   Fix extends
 - 8248862: Implement Enhanced Pseudo-Random Number Generators
   
   Use Map.of instead of Map.ofEntries
 - 8248862: Implement Enhanced Pseudo-Random Number Generators
   
   Changes to RandomGeneratorFactory requested by @PaulSandoz
 - Review changes
   
   @PaulSandoz and @rogermb
 - 8248862: Implement Enhanced Pseudo-Random Number Generators
   
   Update package-info.java
 - ... and 24 more: https://git.openjdk.java.net/jdk/compare/f80c63b3...e75cc844

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Changes: https://git.openjdk.java.net/jdk/pull/1292/files
 Webrev: https://webrevs.openjdk.java.net/?repo=jdk&pr=1292&range=08
  Stats: 13525 lines in 26 files changed: 11366 ins; 2040 del; 119 mod
  Patch: https://git.openjdk.java.net/jdk/pull/1292.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk pull/1292/head:pull/1292

PR: https://git.openjdk.java.net/jdk/pull/1292