[jdk11u-ri] RFR: 8330416: Update system property for Java SE specification maintenance version

[Justin Lu]

Please review this PR which updates the "java.specification.maintenance.version" system property value from 2 to 3. This corresponds with the Java SE 11 Maintenance Release 3.

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Commit messages:
 - init

Changes: https://git.openjdk.org/jdk11u-ri/pull/9/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk11u-ri&pr=9&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8330416
  Stats: 2 lines in 1 file changed: 0 ins; 0 del; 2 mod
  Patch: https://git.openjdk.org/jdk11u-ri/pull/9.diff
  Fetch: git fetch https://git.openjdk.org/jdk11u-ri.git pull/9/head:pull/9

PR: https://git.openjdk.org/jdk11u-ri/pull/9