DERBY-6680 Other jar files may need to be granted permission to read derby.ui.* properties

derby-6680-2. This patch moves the reading of the two system properties up into
NetworkServerControlImpl. Other usage of LocalizedResource is
unaffected and might still try to read those system properties,
i.e. as called from ij.

Removes the note about LocalizedResource in the policy template file.

git-svn-id: https://svn.apache.org/repos/asf/db/derby/code/trunk@1620378 13f79535-47bb-0310-9956-ffa450edef68