RFR: 8224977: [macos] On AquaLookAndFeel, Iconified JInternalFrame does not restore when Control + F5 is used.

[Prasanta Sadhukhan]

test/jdk/javax/swing/JInternalFrame/Test6325652.java test was failing in macos in Aqua L&F due to nonsupport in macos of such shortcuts Ctrl+F5 to restore or Ctrl+F9 to iconify. Keyboard->Shortcut in macos System->Preference do not have these shortcut usage.
https://docs.oracle.com/javase/tutorial/uiswing/components/internalframe.html also does not talk of these shortcut support as standard.
So, removed this test from macos run.

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Commit messages:
 - 8224977: [macos] On AquaLookAndFeel, Iconified JInternalFrame does not restore when Control + F5 is used

Changes: https://git.openjdk.java.net/jdk/pull/7985/files
 Webrev: https://webrevs.openjdk.java.net/?repo=jdk&pr=7985&range=00
  Issue: https://bugs.openjdk.java.net/browse/JDK-8224977
  Stats: 2 lines in 2 files changed: 1 ins; 1 del; 0 mod
  Patch: https://git.openjdk.java.net/jdk/pull/7985.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk pull/7985/head:pull/7985

PR: https://git.openjdk.java.net/jdk/pull/7985