RFR: 8234920: Add SpotLight to the selection of 3D light types [v21]

[Nir Lisker]

On Tue, 8 Jun 2021 14:47:39 GMT, Kevin Rushforth <kcr at openjdk.org> wrote:

>> Nir Lisker has updated the pull request incrementally with one additional commit since the last revision:
>> 
>>   Addressed doc review comments
>
> tests/system/src/test/java/test/javafx/scene/lighting3D/PointLightAttenuationTest.java line 65:
> 
>> 63:         LightingTest.light = LIGHT;
>> 64:         new Thread(() -> Application.launch(TestApp.class, (String[]) null)).start();
>> 65:         assertTrue("Timeout waiting for FX runtime to start", startupLatch.await(5, TimeUnit.SECONDS));
> 
> We should be using at least a 10 second startup timeout. See [JDK-8198587](https://bugs.openjdk.java.net/browse/JDK-8198587).

I copied this from some other class, so I did a search and found the following tests calling `startupLatch.await` with less than 10 seconds:

`HeadlessGeometry1Test`
`HeadlessGeometry2Test`
`TextNodeTest`

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PR: https://git.openjdk.java.net/jfx/pull/334