RFR: 8273401: Remove JarIndex support in URLClassPath [v2]

[wxiang]

On Wed, 8 Sep 2021 06:22:38 GMT, wxiang <github.com+53162078+shiyuexw at openjdk.org> wrote:

>> There is a bug for URLClassPath.findResources with JarIndex.
>> With some discussions about the bug, the current priority is to remove the JAR index support in URLClassPath, 
>> and don’t need to do anything to the jar tool in the short term, except just to move JarIndex to the jdk.jartool module. 
>> 
>> The PR includes:
>> 1. remove the JarIndex support in URLClassPath
>> 2. move JarIndex into  jdk.jartool module.
>
> wxiang has updated the pull request incrementally with one additional commit since the last revision:
> 
>   Some minor changes
>   
>   Include:
>   1. remove public for INDEX_NAME in JarFile
>   2. recover the definition for INDEX_NAME in JarIndex
>   3. mv the test case JarIndexMergeTest.java into test/jdk/java/util/jar

Firstly, disable JarIndex support in URLClassPath. So close the PR.

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PR: https://git.openjdk.java.net/jdk/pull/5383