Add const qualifier to getDocumentLocations to match interface (patch to 191040 for bug XERCESC-1153).
Add const qualifier to getDocumentLocations to match interface (patch to 191040 for bug XERCESC-1153).

git-svn-id: 3ec853389310512053d525963cab269c063bb453@191052 13f79535-47bb-0310-9956-ffa450edef68

AaronNGray/xerces,AaronNGray/xerces,AaronNGray/xerces,AaronNGray/xerces