skel: update default java options to support JVM-17

The jvm-17 is more restrictive than jvm-11, thus some extra explicit
`opens` should be added.

Result:
able to start dCache with java17 JVM

Acked-by: Paul Millar
Acked-by: Lea Morschel
Target: master
Require-book: no
Require-notes: yes

skel/share/defaults/dcache.properties

@@ -198,6 +198,7 @@ dcache.log.resilience.max-history=30
     -XX:+UseCompressedOops \
     -javaagent:${dcache.paths.classes}/aspectjweaver-1.9.2.jar \
     -Djava.net.preferIPv6Addresses=system \
+    --add-opens=java.base/java.lang=ALL-UNNAMED --add-opens=java.base/java.util=ALL-UNNAMED --add-opens=java.base/java.net=ALL-UNNAMED --add-opens=java.base/java.util.concurrent=ALL-UNNAMED --add-opens=java.base/java.text=ALL-UNNAMED --add-opens=java.sql/java.sql=ALL-UNNAMED  --add-opens=java.base/java.math=ALL-UNNAMED --add-opens java.base/sun.nio.fs=ALL-UNNAMED \
     ${dcache.java.options.common} \
     ${dcache.java.options.extra}