Add watchfd keyword to InProcessKernel OutStream initialization

Setting `watchfd`to False when creating OutStream instances for `stdout` prevents an exception caused by the lack of a file descriptor in the stream used by the InProcessKernel .

Author: rayosborn

ipykernel/inprocess/ipkernel.py

@@ -152,11 +152,13 @@ def _default_shell_class(self):
 
     @default('stdout')
     def _default_stdout(self):
-        return OutStream(self.session, self.iopub_thread, 'stdout')
+        return OutStream(self.session, self.iopub_thread, 'stdout', 
+                         watchfd=False)
 
     @default('stderr')
     def _default_stderr(self):
-        return OutStream(self.session, self.iopub_thread, 'stderr')
+        return OutStream(self.session, self.iopub_thread, 'stderr', 
+                         watchfd=False)
 
 #-----------------------------------------------------------------------------
 # Interactive shell subclass