Have WorkbookEvaluator process NameXPtgs, rather than returning a NameXEval which later places didn't handle. Largely allows us to process the .xls version of the test file for #56737 (but filenames aren't quite the same as in Excel)

git-svn-id: https://svn.apache.org/repos/asf/poi/trunk@1611711 13f79535-47bb-0310-9956-ffa450edef68
Update bug reference numbers, and bring over part of a test from unfixed that is now working (rest remains broken)

git-svn-id: https://svn.apache.org/repos/asf/poi/trunk@1611728 13f79535-47bb-0310-9956-ffa450edef68