DERBY-6207 Update policy files in java/drda/org/apache/derby/drda

Removed permission java.util.PropertyPermission "derby.storage.jvmInstanceId", "write";

which is no longer needed, plus formatting improvements.

git-svn-id: https://svn.apache.org/repos/asf/db/derby/code/trunk@1483215 13f79535-47bb-0310-9956-ffa450edef68