RFR: 8236: Add support for Jolokia discovery

[Martin Skarsaune]

On Tue, 2 Jul 2024 20:43:04 GMT, Martin Skarsaune <duke at openjdk.org> wrote:

> Jolokia comes with a discovery mechanism. It is helpful to make use of this to automatically populate the JVM browser, alongside local JVM and other discovery mechanisms.
> 
> https://jolokia.org/reference/html/manual/jolokia_protocol.html#discovery

application/org.openjdk.jmc.jolokia/src/main/java/org/openjdk/jmc/jolokia/AbstractCachedDescriptorProvider.java line 119:

> 117: 	private void initialize() {
> 118: 		scanner = new Scanner();
> 119: 		scannerThread = new Thread(scanner, getName()); // $NON-NLS-1$

Unneccesary. Will remove

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PR Review Comment: https://git.openjdk.org/jmc/pull/570#discussion_r1663158957