RFR: 8292182: [TESTLIB] Enhance JAXPPolicyManager to setup required permissions for jtreg version 7 jar [v3]

[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

Christian Stein has updated the pull request incrementally with one additional commit since the last revision:

  Make file name extraction more robust

-------------

Changes:
  - all: https://git.openjdk.org/jdk/pull/9857/files
  - new: https://git.openjdk.org/jdk/pull/9857/files/0ca1a25c..a9a690a5

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk&pr=9857&range=02
 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=9857&range=01-02

  Stats: 4 lines in 1 file changed: 2 ins; 0 del; 2 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