RFR: 8291911: java/io/File/GetXSpace.java fails with "53687091200 != 161051996160" [v4]

[Brian Burkhalter]

> On Windows, suppress failure if the total space indicated by `df` is less than `FileStore::getTotalSpace` and the free space indicated by `df` equals `FileStore::getUnallocatedSpace`.

Brian Burkhalter 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 seven additional commits since the last revision:

 - 8291911: Use Process::inputReader
 - Merge
 - 8291911: Minor formatting cleanup in test
 - Merge
 - 8291911: work in progress
 - 8291911: Account for quotas on Windows.
 - 8291911: java/io/File/GetXSpace.java fails with "53687091200 != 161051996160"

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Changes:
  - all: https://git.openjdk.org/jdk/pull/9856/files
  - new: https://git.openjdk.org/jdk/pull/9856/files/81296309..02556f26

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk&pr=9856&range=03
 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=9856&range=02-03

  Stats: 224292 lines in 2665 files changed: 115506 ins; 70879 del; 37907 mod
  Patch: https://git.openjdk.org/jdk/pull/9856.diff
  Fetch: git fetch https://git.openjdk.org/jdk pull/9856/head:pull/9856

PR: https://git.openjdk.org/jdk/pull/9856