PDFBOX-1056: added activation and stax maven dependency to remove java6 dependency
PDFBOX-1056: added activation and stax maven dependency to remove java6 dependency

git-svn-id: c3ad59981690829a43dc34c293c4e2cd04bcd994@1150786 13f79535-47bb-0310-9956-ffa450edef68

joansmith/pdfbox,mathieufortin01/pdfbox,mdamt/pdfbox,mdamt/pdfbox,gavanx/pdflearn,torakiki/sambox,ChunghwaTelecom/pdfbox,joansmith/pdfbox,gavanx/pdflearn,torakiki/sambox,ZhenyaM/veraPDF-pdfbox,benmccann/pdfbox,ChunghwaTelecom/pdfbox,benmccann/pdfbox,BezrukovM/veraPDF-pdfbox,ZhenyaM/veraPDF-pdfbox,veraPDF/veraPDF-pdfbox,veraPDF/veraPDF-pdfbox,BezrukovM/veraPDF-pdfbox,mathieufortin01/pdfbox