If a file is in the groups area that doesn't have member access
then the group member that initially uploaded it can't view it

This patch allows the author (uploader) of a file to still have access
no matter what the access is set to for the group role they belong to

Bug #812673

Change-Id: I1d5bbccb41d34af15617ac5abc673b1265ac9f3e
Signed-off-by: Hugh Davenport <hugh@catalyst.net.nz>