[jdk17u-dev] RFR: 8310072: JComboBox/DisabledComboBoxFontTestAuto: Enabled and disabled ComboBox does not match in these LAFs: GTK+

[KIRIYAMA Takuya]

Hi all,
This pull request is the backport of JDK-8310072.
It is clean and change only DisabledComboBoxFontTestAuto.java. This change resolves a test failure added by the JDK-7093691.
JDK-7093691will be backported in #3008.

Testing:
javax/swing/JComboBox on Windows and Linux

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Commit messages:
 - 8310072: JComboBox/DisabledComboBoxFontTestAuto: Enabled and disabled ComboBox does not match in these LAFs: GTK+
 - Update full name
 - 7093691: Nimbus LAF: disabled JComboBox using renderer has bad font color
 - 7093691: Nimbus LAF: disabled JComboBox using renderer has bad font color
 - 7093691: Nimbus LAF: disabled JComboBox using renderer has bad font color

Changes: https://git.openjdk.org/jdk17u-dev/pull/3009/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk17u-dev&pr=3009&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8310072
  Stats: 224 lines in 3 files changed: 215 ins; 6 del; 3 mod
  Patch: https://git.openjdk.org/jdk17u-dev/pull/3009.diff
  Fetch: git fetch https://git.openjdk.org/jdk17u-dev.git pull/3009/head:pull/3009

PR: https://git.openjdk.org/jdk17u-dev/pull/3009