Merge branch '1.9.x' of github.com:beeznest/chamilo-lms-utp into 1.9.x
update : new records = format file__idsession__.txt -ref BT#8186
upate file unique for session JS:show front-end file.txt - ref BR#8186
update :to upload a.pdf:  IF session = 0 not change name | session>0 change name
file unique for curso y session - ref BT#8186
Merge pull request #82 from DeEvo/8186

Update : document/file.jpg , files unique for session  - ref BT#8186