RFR: 7017094: ParsedSynthStyle: parameter name direction should be changed to tabIndex

[Prasanta Sadhukhan]

[SynthPainter](https://github.com/openjdk/jdk/blob/master/src/java.desktop/share/classes/javax/swing/plaf/synth/SynthPainter.java#L1759)
and 
[SynthPainterImpl](https://github.com/openjdk/jdk/blob/master/src/java.desktop/share/classes/javax/swing/plaf/nimbus/SynthPainterImpl.java#L2074)
expects a "tabIndex" although the parameter is not used currently.

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Commit messages:
 - 7017094: ParsedSynthStyle: parameter name direction should be changed to tabIndex

Changes: https://git.openjdk.java.net/jdk/pull/7551/files
 Webrev: https://webrevs.openjdk.java.net/?repo=jdk&pr=7551&range=00
  Issue: https://bugs.openjdk.java.net/browse/JDK-7017094
  Stats: 2 lines in 1 file changed: 0 ins; 0 del; 2 mod
  Patch: https://git.openjdk.java.net/jdk/pull/7551.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk pull/7551/head:pull/7551

PR: https://git.openjdk.java.net/jdk/pull/7551