Fixed all sftp actions.

On ubuntu sftp-server is not at the same place as on gentoo machines. The
enhanced sshd_config did not account for that.

separate_machines/docker/sshd_config

@@ -124,7 +124,7 @@ UseDNS no
 #Banner none
 
 # override default of no subsystems
-Subsystem	sftp	/usr/lib64/misc/sftp-server
+Subsystem sftp /usr/lib/openssh/sftp-server
 
 # the following are HPN related configuration options
 # tcp receive buffer polling. disable in non autotuning kernels

src/lib/fileUpload.js

@@ -4,14 +4,17 @@ var SocketIOFileUpload = require('socketio-file-upload');
 module.exports = function (clients, logExceptOnTest, sshCredentials) {
     var completeFileUpload = function (clientId) {
         return function (event) {
+            var credentials = sshCredentials(clients[clientId].instance);
             var connection = ssh2();
 
             connection.on('end', function () {
             });
 
             connection.on('ready', function () {
                 connection.sftp(function (err, sftp) {
-                    console.log("Have stream.");
+                    if(err){
+                        console.log("There was an error while connecting via sftp: " + err);
+                    }
                     var stream = sftp.createWriteStream(event.file.name);
                     stream.write(clients[clientId].fileUploadBuffer.toString());
                     stream.end(function () {
@@ -20,8 +23,8 @@ module.exports = function (clients, logExceptOnTest, sshCredentials) {
                     clients[clientId].fileUploadBuffer = "";
                 });
             });
-            console.log(sshCredentials(clients[clientId].instance));
-            connection.connect(sshCredentials(clients[clientId].instance));
+
+            connection.connect(credentials);
         };
     };