RFR: 8296920: Regression Test DialogOrient.java fails on MacOS

[Prasanta Sadhukhan]

Test was failing with PrinterException: Wrong Orientation since printing was done with default orientation.
Fix is made to set the printable with correct PageFormat

It was not seen prior to [JDK-8262731](https://bugs.openjdk.org/browse/JDK-8262731) probably because the exception was being swallowed..

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Commit messages:
 - 8296920: Regression Test DialogOrient.java fails on MacOS

Changes: https://git.openjdk.org/jdk/pull/13950/files
 Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=13950&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8296920
  Stats: 2 lines in 1 file changed: 1 ins; 1 del; 0 mod
  Patch: https://git.openjdk.org/jdk/pull/13950.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/13950/head:pull/13950

PR: https://git.openjdk.org/jdk/pull/13950