RFR: 8267844: Replace Integer/Long.valueOf() with Integer/Long.parse*() where applicable [v2]

[Сергей Цыпанов]

> The code in `Integer.decode()` and `Long.decode()` might allocate two instances of Integer/Long for the negative values less than -127:
> 
> Integer result;
> 
> result = Integer.valueOf(nm.substring(index), radix);
> result = negative ? Integer.valueOf(-result.intValue()) : result;
> 
> To avoid this we can declare 'result' as `int` and use `Integer.parseInt()` method. Same applicable for `Long` and some other classes.

Сергей Цыпанов has updated the pull request with a new target base due to a merge or a rebase. The incremental webrev excludes the unrelated changes brought in by the merge/rebase. The pull request contains five additional commits since the last revision:

 - 8267844: Add benchmarks for Integer/Long.decode()
 - 8267844: Rid useless substring when calling Integer/Long.parse*()
 - Merge branch 'master' into 8267844
 - Merge branch 'master' into 8267844
 - 8267844: Replace Integer/Long.valueOf() with Integer/Long.parse*() where applicable

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

Changes:
  - all: https://git.openjdk.java.net/jdk/pull/5068/files
  - new: https://git.openjdk.java.net/jdk/pull/5068/files/a1b993d4..7486b13f

Webrevs:
 - full: https://webrevs.openjdk.java.net/?repo=jdk&pr=5068&range=01
 - incr: https://webrevs.openjdk.java.net/?repo=jdk&pr=5068&range=00-01

  Stats: 149574 lines in 2453 files changed: 97455 ins; 39648 del; 12471 mod
  Patch: https://git.openjdk.java.net/jdk/pull/5068.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk pull/5068/head:pull/5068

PR: https://git.openjdk.java.net/jdk/pull/5068