RFR: 8268683: JavaFX MediaPlayer onEndOfMedia behaviour different from Javadoc

[Alexander Matveev]

Fixed javadoc to indicate that onEndOfMedia is invoked each time when end of cycle is reached regardless if it is repeating or not.

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Commit messages:
 - 8268683: JavaFX MediaPlayer onEndOfMedia behaviour different from Javadoc

Changes: https://git.openjdk.java.net/jfx/pull/552/files
 Webrev: https://webrevs.openjdk.java.net/?repo=jfx&pr=552&range=00
  Issue: https://bugs.openjdk.java.net/browse/JDK-8268683
  Stats: 6 lines in 1 file changed: 1 ins; 0 del; 5 mod
  Patch: https://git.openjdk.java.net/jfx/pull/552.diff
  Fetch: git fetch https://git.openjdk.java.net/jfx pull/552/head:pull/552

PR: https://git.openjdk.java.net/jfx/pull/552