RFR: 8292182: [TESTLIB] Enhance JAXPPolicyManager to setup required permissions for jtreg version 7 jar

[Christian Stein]

Enhance `JAXPPolicyManager` to setup required permissions for `jtreg` 7 by accept version information in JAR file names.

Find details in https://bugs.openjdk.org/browse/JDK-8292182

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Commit messages:
 - 8292182: [TESTLIB] Enhance JAXPPolicyManager to setup required permissions for jtreg version 7 jar

Changes: https://git.openjdk.org/jdk/pull/9857/files
 Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=9857&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8292182
  Stats: 6 lines in 1 file changed: 2 ins; 0 del; 4 mod
  Patch: https://git.openjdk.org/jdk/pull/9857.diff
  Fetch: git fetch https://git.openjdk.org/jdk pull/9857/head:pull/9857

PR: https://git.openjdk.org/jdk/pull/9857