RFR: JDK-8292914: Introduce a system property that enables stable names for lambda classes [v2]

[Strahinja Stanojevic]

> This PR introduces a system property that creates stable names for the lambda classes in the JDK. Instead of using an atomic counter in the lambda name, we can use a 32-bit hash after `$$Lambda$`. Thus, the name becomes `lambdaCapturingClass$$Lambda$hashValue`.
> Parameters used to create a stable part of the name (hash value) are a superset of the parameters used for lambda class archiving when the CDS dumping option is enabled. During the stable name creation process,
> all the common parameters are in the same form as in the low-level implementation (C part of the code) of the archiving process.
> We concatenate all of those parameters in one string `hashData`. We calculate the long hash value for `hashData` in the same manner as the `java.lang.StringUTF16#hashCode` does, and then we hash that value using `Long.toString(longHashValue, Character.MAX_RADIX)`. The desired length for this hash is equal to the length of the `Long.toString(Long.MAX_VALUE, Character.MAX_RADIX)`.
> Sometimes, the calculated hash value is shorter than the desired length, so we pad it with the character `#` to hit it. Appending `#` only affects the hash length, but not its stability.
> 
> Link to the related issue: https://bugs.openjdk.org/browse/JDK-8292914

Strahinja Stanojevic has updated the pull request incrementally with one additional commit since the last revision:

  Enhance test with lambdas created as method references

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Changes:
  - all: https://git.openjdk.org/jdk/pull/10024/files
  - new: https://git.openjdk.org/jdk/pull/10024/files/1f551d1d..dd268934

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk&pr=10024&range=01
 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=10024&range=00-01

  Stats: 30 lines in 2 files changed: 12 ins; 16 del; 2 mod
  Patch: https://git.openjdk.org/jdk/pull/10024.diff
  Fetch: git fetch https://git.openjdk.org/jdk pull/10024/head:pull/10024

PR: https://git.openjdk.org/jdk/pull/10024