RFR: 8253379: [windows] Several jpackage tests failed with error code 1638

[Andy Herrick]

8253379: [windows] Several jpackage tests failed with error code 1638
two windows specific test fixes in WindowsHelper:
1.) do not test that the parent directory of a windows menu shortcut is empty after shortcut is uninstalled (there may
be other shortcuts using that directory) 2.) do not programmatically install windows exe installers (since we have no
way of programmatically uninstalling them)

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Commit messages:
 - 8253379: [windows] Several jpackage tests failed with error code 1638

Changes: https://git.openjdk.java.net/jdk/pull/337/files
 Webrev: https://webrevs.openjdk.java.net/?repo=jdk&pr=337&range=00
  Issue: https://bugs.openjdk.java.net/browse/JDK-8253379
  Stats: 9 lines in 1 file changed: 2 ins; 3 del; 4 mod
  Patch: https://git.openjdk.java.net/jdk/pull/337.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk pull/337/head:pull/337

PR: https://git.openjdk.java.net/jdk/pull/337