RFR: 8275536: [TEST] java.io.File and java.nio.File should return the same timestamp for lastModified [v3]

[Clive Verghese]

> The test validated that the precision returned by `java.io.File.lastModified` and `java.nio.file.Files.getLastModifiedTime` are the same.

Clive Verghese has updated the pull request incrementally with one additional commit since the last revision:

  Move test from java/nio to java/io

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

Changes:
  - all: https://git.openjdk.java.net/jdk/pull/6054/files
  - new: https://git.openjdk.java.net/jdk/pull/6054/files/a0bb4a05..d9531017

Webrevs:
 - full: https://webrevs.openjdk.java.net/?repo=jdk&pr=6054&range=02
 - incr: https://webrevs.openjdk.java.net/?repo=jdk&pr=6054&range=01-02

  Stats: 0 lines in 1 file changed: 0 ins; 0 del; 0 mod
  Patch: https://git.openjdk.java.net/jdk/pull/6054.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk pull/6054/head:pull/6054

PR: https://git.openjdk.java.net/jdk/pull/6054