fix multiproc access to terminal_output

Author: oesteban

nipype/pipeline/plugins/multiproc.py

@@ -139,8 +139,9 @@ def _submit_job(self, node, updatehash=False):
         self._taskid += 1
 
         # Don't allow streaming outputs
-        if node.terminal_output == 'stream':
-            node.terminal_output = 'allatonce'
+        if hasattr(node.interface, 'terminal_output') and \
+                node.interface.terminal_output == 'stream':
+            node.interface.terminal_output = 'allatonce'
 
         self._task_obj[self._taskid] = self.pool.apply_async(
             run_node, (node, updatehash, self._taskid),