DERBY-6518: Clone the StringUtil.split() method and put it in JVMInfo; commit derby-6518-02-aa-cloneSplitMethod.diff.

git-svn-id: https://svn.apache.org/repos/asf/db/derby/code/branches/10.10@1629749 13f79535-47bb-0310-9956-ffa450edef68