[#6704] ticket:454 added checking if file exists
[#6704] ticket:454 added checking if file exists

heiths/allura,apache/allura,lym/allura-git,apache/allura,apache/incubator-allura,apache/allura,heiths/allura,apache/allura,apache/incubator-allura,heiths/allura,lym/allura-git,apache/incubator-allura,apache/incubator-allura,heiths/allura,heiths/allura,lym/allura-git,apache/allura,lym/allura-git,lym/allura-git