SAK-16029 upgrade Sakai to Spring 2.5.6
SAK-16029 upgrade Sakai to Spring 2.5.6

git-svn-id: 33bfb07abb5e6b25fc84e5a4806e76c6fa47d6b5@64578 66ffb92e-73f9-0310-93c1-f5514f145a0a

zqian/sakai,rodriguezdevera/sakai,surya-janani/sakai,zqian/sakai,Fudan-University/sakai,ouit0408/sakai,zqian/sakai,joserabal/sakai,joserabal/sakai,rodriguezdevera/sakai,kwedoff1/sakai,kwedoff1/sakai,OpenCollabZA/sakai,pushyamig/sakai,frasese/sakai,clhedrick/sakai,bzhouduke123/sakai,frasese/sakai,bkirschn/sakai,ktakacs/sakai,noondaysun/sakai,noondaysun/sakai,buckett/sakai-gitflow,pushyamig/sakai,buckett/sakai-gitflow,frasese/sakai,willkara/sakai,duke-compsci290-spring2016/sakai,noondaysun/sakai,colczr/sakai,hackbuteer59/sakai,bzhouduke123/sakai,willkara/sakai,rodriguezdevera/sakai,hackbuteer59/sakai,liubo404/sakai,surya-janani/sakai,whumph/sakai,udayg/sakai,hackbuteer59/sakai,hackbuteer59/sakai,zqian/sakai,OpenCollabZA/sakai,wfuedu/sakai,clhedrick/sakai,kwedoff1/sakai,introp-software/sakai,duke-compsci290-spring2016/sakai,ktakacs/sakai,OpenCollabZA/sakai,puramshetty/sakai,udayg/sakai,udayg/sakai,duke-compsci290-spring2016/sakai,udayg/sakai,zqian/sakai,wfuedu/sakai,clhedrick/sakai,surya-janani/sakai,rodriguezdevera/sakai,zqian/sakai,bkirschn/sakai,wfuedu/sakai,frasese/sakai,rodriguezdevera/sakai,clhedrick/sakai,buckett/sakai-gitflow,tl-its-umich-edu/sakai,rodriguezdevera/sakai,ktakacs/sakai,noondaysun/sakai,Fudan-University/sakai,tl-its-umich-edu/sakai,whumph/sakai,bzhouduke123/sakai,udayg/sakai,noondaysun/sakai,bzhouduke123/sakai,hackbuteer59/sakai,ouit0408/sakai,ktakacs/sakai,udayg/sakai,kingmook/sakai,whumph/sakai,colczr/sakai,ktakacs/sakai,Fudan-University/sakai,tl-its-umich-edu/sakai,lorenamgUMU/sakai,rodriguezdevera/sakai,lorenamgUMU/sakai,zqian/sakai,puramshetty/sakai,kwedoff1/sakai,joserabal/sakai,OpenCollabZA/sakai,colczr/sakai,willkara/sakai,tl-its-umich-edu/sakai,colczr/sakai,ouit0408/sakai,tl-its-umich-edu/sakai,joserabal/sakai,duke-compsci290-spring2016/sakai,puramshetty/sakai,colczr/sakai,whumph/sakai,conder/sakai,whumph/sakai,liubo404/sakai,liubo404/sakai,kwedoff1/sakai,kwedoff1/sakai,joserabal/sakai,lorenamgUMU/sakai,tl-its-umich-edu/sakai,kingmook/sakai,buckett/sakai-gitflow,liubo404/sakai,wfuedu/sakai,ktakacs/sakai,bzhouduke123/sakai,frasese/sakai,ouit0408/sakai,ktakacs/sakai,bkirschn/sakai,liubo404/sakai,clhedrick/sakai,conder/sakai,kingmook/sakai,buckett/sakai-gitflow,hackbuteer59/sakai,willkara/sakai,surya-janani/sakai,surya-janani/sakai,surya-janani/sakai,wfuedu/sakai,introp-software/sakai,buckett/sakai-gitflow,bkirschn/sakai,OpenCollabZA/sakai,duke-compsci290-spring2016/sakai,Fudan-University/sakai,Fudan-University/sakai,kwedoff1/sakai,buckett/sakai-gitflow,pushyamig/sakai,noondaysun/sakai,whumph/sakai,OpenCollabZA/sakai,whumph/sakai,ktakacs/sakai,introp-software/sakai,pushyamig/sakai,kingmook/sakai,puramshetty/sakai,duke-compsci290-spring2016/sakai,clhedrick/sakai,pushyamig/sakai,colczr/sakai,duke-compsci290-spring2016/sakai,puramshetty/sakai,Fudan-University/sakai,noondaysun/sakai,rodriguezdevera/sakai,hackbuteer59/sakai,lorenamgUMU/sakai,bkirschn/sakai,tl-its-umich-edu/sakai,liubo404/sakai,joserabal/sakai,noondaysun/sakai,introp-software/sakai,bkirschn/sakai,introp-software/sakai,udayg/sakai,joserabal/sakai,bzhouduke123/sakai,conder/sakai,tl-its-umich-edu/sakai,clhedrick/sakai,OpenCollabZA/sakai,pushyamig/sakai,buckett/sakai-gitflow,surya-janani/sakai,pushyamig/sakai,ouit0408/sakai,whumph/sakai,introp-software/sakai,lorenamgUMU/sakai,wfuedu/sakai,ouit0408/sakai,kwedoff1/sakai,puramshetty/sakai,OpenCollabZA/sakai,joserabal/sakai,duke-compsci290-spring2016/sakai,willkara/sakai,kingmook/sakai,zqian/sakai,kingmook/sakai,ouit0408/sakai,willkara/sakai,colczr/sakai,wfuedu/sakai,frasese/sakai,udayg/sakai,liubo404/sakai,frasese/sakai,puramshetty/sakai,frasese/sakai,kingmook/sakai,introp-software/sakai,clhedrick/sakai,liubo404/sakai,ouit0408/sakai,kingmook/sakai,bkirschn/sakai,hackbuteer59/sakai,conder/sakai,Fudan-University/sakai,wfuedu/sakai,conder/sakai,conder/sakai,lorenamgUMU/sakai,lorenamgUMU/sakai,surya-janani/sakai,puramshetty/sakai,Fudan-University/sakai,bzhouduke123/sakai,conder/sakai,willkara/sakai,willkara/sakai,pushyamig/sakai,introp-software/sakai,conder/sakai,lorenamgUMU/sakai,colczr/sakai,bkirschn/sakai,bzhouduke123/sakai