RFR: 8295324: JavaFX: Blank pages when printing [v4]

[eduardsdv]

> This fixes a race condition between application and 'Print Job Thread' threads when printing.
> 
> The race condition occurs when application thread calls `endJob()`, which in effect sets the `jobDone` flag to true,
> and when the 'Print Job Thread' thread was in the `synchronized` block in `waitForNextPage()` at that time.
> The 'Print Job Thread' thread checks `jobDone` flag after exiting the `synchronized` block and, if it is true, skips the last page.
> 
> In this fix, not only the `jobDone` is checked, but also that there is no other page to be printed.
> It was also needed to introduce a new flag 'jobCanceled', to skip the page if the printing was canceled by 'cancelJob()'.

eduardsdv has updated the pull request incrementally with three additional commits since the last revision:

 - Revert "8295324: Apply patch with junit from the issue"
   
   This reverts commit c76b8207242a7af82f5515e49760158fa40da2a9.
 - Revert "8295324: Fix race condition in junit test"
   
   This reverts commit fdec73d8f4ff21908bf99d191b76ffeed42bfb36.
 - Revert "8295324: Adjust the J2DPrinterJobTest"
   
   This reverts commit 0723d2ebcd2c41d40005dbb1652c4ec96cfe4f8c.

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

Changes:
  - all: https://git.openjdk.org/jfx/pull/916/files
  - new: https://git.openjdk.org/jfx/pull/916/files/acd4825b..127cb03b

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jfx&pr=916&range=03
 - incr: https://webrevs.openjdk.org/?repo=jfx&pr=916&range=02-03

  Stats: 488 lines in 6 files changed: 6 ins; 471 del; 11 mod
  Patch: https://git.openjdk.org/jfx/pull/916.diff
  Fetch: git fetch https://git.openjdk.org/jfx pull/916/head:pull/916

PR: https://git.openjdk.org/jfx/pull/916