add bsub wrapper for LSFEngineSet

LSF requires that job scripts be submitted to bsub through stdin.
twisted.internet.utils.getProcessOutput does not support shell
redirection so the bsub wrapper takes care of doing this.

IPython/kernel/scripts/ipcluster.py

@@ -393,6 +393,21 b' class LSFEngineSet(PBSEngineSet):'
 eid=$(($LSB_JOBINDEX - 1))
 ipengine --logfile=ipengine${eid}.log
 """
+    bsub_wrapper="""#!/bin/sh
+bsub < $1
+"""
+
+    def __init__(self, template_file, queue, **kwargs):
+        self._bsub_wrapper = self._make_bsub_wrapper()
+        self.submit_command = self._bsub_wrapper.name
+        PBSEngineSet.__init__(self,template_file, queue, **kwargs)
+
+    def _make_bsub_wrapper(self):
+        bsub_wrapper = tempfile.NamedTemporaryFile()
+        bsub_wrapper.write(self.bsub_wrapper)
+        bsub_wrapper.file.close()
+        os.chmod(bsub_wrapper.name, stat.S_IRUSR | stat.S_IWUSR | stat.S_IXUSR)
+        return bsub_wrapper
 
 sshx_template="""#!/bin/sh
 "$@" &> /dev/null &