[jdk8u-dev] RFR: 8299677: Formatter.format might take a long time to format an integer or floating-point

[Chad Rakoczy]

Backport of [JDK-8299677](https://bugs.openjdk.org/browse/JDK-8299677)

Backport was not clean. Rewrote test to not include junit `ParameterizedTest`. Rewrote fix since `String.repeat` is not in JDK8

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Commit messages:
 - Backport 33412c102ce799ff2de3512df77e6e07d76acd36

Changes: https://git.openjdk.org/jdk8u-dev/pull/459/files
 Webrev: https://webrevs.openjdk.org/?repo=jdk8u-dev&pr=459&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8299677
  Stats: 321 lines in 2 files changed: 317 ins; 0 del; 4 mod
  Patch: https://git.openjdk.org/jdk8u-dev/pull/459.diff
  Fetch: git fetch https://git.openjdk.org/jdk8u-dev.git pull/459/head:pull/459

PR: https://git.openjdk.org/jdk8u-dev/pull/459