RFR: 8273826: Correct Manifest file name and NPE checks [v2]

[Sean Coffey]

On Thu, 7 Oct 2021 14:57:53 GMT, Sean Mullan <mullan at openjdk.org> wrote:

>> Sean Coffey has updated the pull request incrementally with one additional commit since the last revision:
>> 
>>   Make variables final
>
> test/jdk/sun/security/tools/jarsigner/warnings/LowerCaseManifest.java line 38:
> 
>> 36:  * @library /test/lib ../
>> 37:  * @build jdk.test.lib.util.JarUtils
>> 38:  * @run main LowerCaseManifest
> 
> You don't need this line as this is the default @run setting.

Looks like it's required if there's a @build directive

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PR: https://git.openjdk.java.net/jdk/pull/5841