Update the RefEval method signature to cope with multi-sheet references, and have appropriate functions take advantage of this. For bug #55906

git-svn-id: https://svn.apache.org/repos/asf/poi/trunk@1613453 13f79535-47bb-0310-9956-ffa450edef68
Split the reference and area tests for #55906

git-svn-id: https://svn.apache.org/repos/asf/poi/trunk@1613454 13f79535-47bb-0310-9956-ffa450edef68