[editor] Adding a file to a Shell job fails with TypeError: unsupported operand type(s) for +: 'dict' and 'str'

Env:  Hue 4.0. 

I commit a shell action in query editor. When a select a script  like below image, and run  .
 It export report Error:  "

    unsupported operand type(s) for +: 'dict' and 'str'

"
Job was kiled cause the file is not setting in oozie:


```
<workflow-app name="Batch job for query-shell" xmlns="uri:oozie:workflow:0.5">
    <start to="shell-109b"/>
    <kill name="Kill">
        <message>Action failed, error message[${wf:errorMessage(wf:lastErrorNode())}]</message>
    </kill>
    <action name="shell-109b">
        <shell xmlns="uri:oozie:shell-action:0.1">
            <job-tracker>${jobTracker}</job-tracker>
            <name-node>${nameNode}</name-node>
            <exec>/user/zpdn1691/test_env.sh</exec>
              <capture-output/>
        </shell>
        <ok to="End"/>
        <error to="Kill"/>
    </action>
    <end name="End"/>
</workflow-app>
```

I found a similar issue, but I said the issues was resolved in hue 2.0.

https://issues.cloudera.org/browse/HUE-1032




logs:


Traceback (most recent call last):
  File "/home/hadoop/hue/4.0/test/hue/desktop/libs/notebook/src/notebook/decorators.py", line 82, in decorator
    return func(*args, **kwargs)
  File "/home/hadoop/hue/4.0/test/hue/desktop/libs/notebook/src/notebook/api.py", line 164, in execute
    response = _execute_notebook(request, notebook, snippet)
  File "/home/hadoop/hue/4.0/test/hue/desktop/libs/notebook/src/notebook/api.py", line 115, in _execute_notebook
    response['handle'] = get_api(request, snippet).execute(notebook, snippet)
  File "/home/hadoop/hue/4.0/test/hue/desktop/libs/notebook/src/notebook/connectors/oozie_batch.py", line 78, in execute
    job_id = _submit_workflow(user=self.user, fs=self.fs, jt=self.jt, workflow=workflow, mapping=None)
  File "/home/hadoop/hue/4.0/test/hue/apps/oozie/src/oozie/views/editor2.py", line 441, in _submit_workflow
    job_id = submission.run()
  File "/home/hadoop/hue/4.0/test/hue/desktop/libs/liboozie/src/liboozie/submission2.py", line 52, in decorate
    deployment_dir = self.deploy()
  File "/home/hadoop/hue/4.0/test/hue/desktop/libs/liboozie/src/liboozie/submission2.py", line 290, in deploy
    oozie_xml = self.job.to_xml(self.properties)
  File "/home/hadoop/hue/4.0/test/hue/apps/oozie/src/oozie/models2.py", line 459, in to_xml
    'workflow_mapping': workflow_mapping
  File "/home/hadoop/hue/4.0/test/hue/desktop/core/src/desktop/lib/django_mako.py", line 114, in render_to_string_normal
    result = template.render(**data_dict)
  File "/home/hadoop/hue/4.0/test/hue/build/env/local/lib/python2.7/site-packages/Mako-0.8.1-py2.7.egg/mako/template.py", line 443, in render
    return runtime._render(self, self.callable_, args, data)
  File "/home/hadoop/hue/4.0/test/hue/build/env/local/lib/python2.7/site-packages/Mako-0.8.1-py2.7.egg/mako/runtime.py", line 786, in _render
    **_kwargs_for_callable(callable_, data))
  File "/home/hadoop/hue/4.0/test/hue/build/env/local/lib/python2.7/site-packages/Mako-0.8.1-py2.7.egg/mako/runtime.py", line 818, in _render_context
    _exec_template(inherit, lclcontext, args=args, kwargs=kwargs)
  File "/home/hadoop/hue/4.0/test/hue/build/env/local/lib/python2.7/site-packages/Mako-0.8.1-py2.7.egg/mako/runtime.py", line 844, in _exec_template
    callable_(context, *args, **kwargs)
  File "/tmp/tmpP_7Hii/oozie/editor2/gen/workflow.xml.mako.py", line 110, in render_body
    __M_writer( node.to_xml(mapping, node_mapping, workflow_mapping) )
  File "/home/hadoop/hue/4.0/test/hue/apps/oozie/src/oozie/models2.py", line 916, in to_xml
    return django_mako.render_to_string(self.get_template_name(), data)
  File "/home/hadoop/hue/4.0/test/hue/desktop/core/src/desktop/lib/django_mako.py", line 114, in render_to_string_normal
    result = template.render(**data_dict)
  File "/home/hadoop/hue/4.0/test/hue/build/env/local/lib/python2.7/site-packages/Mako-0.8.1-py2.7.egg/mako/template.py", line 443, in render
    return runtime._render(self, self.callable_, args, data)
  File "/home/hadoop/hue/4.0/test/hue/build/env/local/lib/python2.7/site-packages/Mako-0.8.1-py2.7.egg/mako/runtime.py", line 786, in _render
    **_kwargs_for_callable(callable_, data))
  File "/home/hadoop/hue/4.0/test/hue/build/env/local/lib/python2.7/site-packages/Mako-0.8.1-py2.7.egg/mako/runtime.py", line 818, in _render_context
    _exec_template(inherit, lclcontext, args=args, kwargs=kwargs)
  File "/home/hadoop/hue/4.0/test/hue/build/env/local/lib/python2.7/site-packages/Mako-0.8.1-py2.7.egg/mako/runtime.py", line 844, in _exec_template
    callable_(context, *args, **kwargs)
  File "/tmp/tmpP_7Hii/oozie/editor2/gen/workflow-shell-document.xml.mako.py", line 88, in render_body
    __M_writer(escape(unicode( common.distributed_cache(node['properties']['files'], node['properties']['archives']) )))
  File "/tmp/tmpP_7Hii/oozie/editor2/gen/workflow-common.xml.mako.py", line 111, in render_distributed_cache
    __M_writer(escape(unicode( filelink(f['value']) )))
  File "/tmp/tmpP_7Hii/oozie/editor2/gen/workflow-common.xml.mako.py", line 92, in filelink
    return render_filelink(context,path)
  File "/tmp/tmpP_7Hii/oozie/editor2/gen/workflow-common.xml.mako.py", line 82, in render_filelink
    __M_writer(escape(unicode( '#' in path and path or path + '#' + posixpath.basename(path) )))
TypeError: unsupported operand type(s) for +: 'dict' and 'str'