RFR: 8312489: Increase jdk.jar.maxSignatureFileSize default which is too low for JARs such as WhiteSource/Mend unified agent jar

[Hai-May Chao]

JDK-8312489: Increase jdk.jar.maxSignatureFileSize default which is too low for JARs such as WhiteSource/Mend unified agent jar

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Commit messages:
 - 8312489: Increase jdk.jar.maxSignatureFileSize default which is too low for JARs such as WhiteSource/Mend unified agent jar

Changes: https://git.openjdk.org/jdk/pull/15072/files
 Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=15072&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8312489
  Stats: 6 lines in 2 files changed: 2 ins; 0 del; 4 mod
  Patch: https://git.openjdk.org/jdk/pull/15072.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/15072/head:pull/15072

PR: https://git.openjdk.org/jdk/pull/15072