SXSSF and XSSF classes oddly rely on o.a.p.hssf.util.PaneInformation. Perhaps this class never got migrated over to ss common.
Applied in r1751044. Kept o.a.p.hssf.util.PaneInformation for backwards compatibility, but this should be removed sooner than later because it is shadowing its parent in o.a.p.ss.util. Updated changelog in r1751047
Temporarily added a findbugs rule for duplicate classes with same name in r1751081