create content_type: jinja2.exceptions.UndefinedError: 'dict object' has no attribute 'is_plone5'

• Plone CLI version: 2.1.2
• Python version: 3.6.9
• Operating System: Ubuntu 18.04

Description

I was trying to add a content type to a package previously created by plonecli.

What I Did

--> Content type name (Allowed: _ a-z A-Z and whitespace) [Todo Task]: PSD X Tool

--> Content type description: 

--> Use XML Model [y]: n

--> Dexterity base class (Container/Item) [Container]: Item

--> Should the content type globally addable? [y]: 

--> Create a content type class [y]: 

--> Activate default behaviors? [y]: n


Traceback (most recent call last):
  File "/usr/local/plone-5.2/zeoserver/bin/plonecli", line 8, in <module>
    sys.exit(cli())
  File "/usr/local/plone-5.2/zeoserver/lib/python3.6/site-packages/click/core.py", line 829, in __call__
    return self.main(*args, **kwargs)
  File "/usr/local/plone-5.2/zeoserver/lib/python3.6/site-packages/click/core.py", line 782, in main
    rv = self.invoke(ctx)
  File "/usr/local/plone-5.2/zeoserver/lib/python3.6/site-packages/click/core.py", line 1289, in invoke
    rv.append(sub_ctx.command.invoke(sub_ctx))
  File "/usr/local/plone-5.2/zeoserver/lib/python3.6/site-packages/click/core.py", line 1066, in invoke
    return ctx.invoke(self.callback, **ctx.params)
  File "/usr/local/plone-5.2/zeoserver/lib/python3.6/site-packages/click/core.py", line 610, in invoke
    return callback(*args, **kwargs)
  File "/usr/local/plone-5.2/zeoserver/lib/python3.6/site-packages/click/decorators.py", line 21, in new_func
    return f(get_current_context(), *args, **kwargs)
  File "/usr/local/plone-5.2/zeoserver/lib/python3.6/site-packages/plonecli/cli.py", line 91, in create
    mrbobmain([bobtemplate, "-O", name])
  File "/usr/local/plone-5.2/zeoserver/lib/python3.6/site-packages/mrbob/cli.py", line 175, in main
    c.render()
  File "/usr/local/plone-5.2/zeoserver/lib/python3.6/site-packages/mrbob/configurator.py", line 193, in render
    self.ignored_directories)
  File "/usr/local/plone-5.2/zeoserver/lib/python3.6/site-packages/mrbob/rendering.py", line 82, in render_structure
    renderer,
  File "/usr/local/plone-5.2/zeoserver/lib/python3.6/site-packages/mrbob/rendering.py", line 102, in render_template
    output = renderer(source_output, variables)
  File "/usr/local/plone-5.2/zeoserver/lib/python3.6/site-packages/mrbob/rendering.py", line 22, in <lambda>
    jinja2_renderer = lambda s, v: jinja2_env.from_string(s).render(parse_variables(v))
  File "/usr/local/plone-5.2/zeoserver/lib/python3.6/site-packages/jinja2/environment.py", line 1090, in render
    self.environment.handle_exception()
  File "/usr/local/plone-5.2/zeoserver/lib/python3.6/site-packages/jinja2/environment.py", line 832, in handle_exception
    reraise(*rewrite_traceback_stack(source=source))
  File "/usr/local/plone-5.2/zeoserver/lib/python3.6/site-packages/jinja2/_compat.py", line 28, in reraise
    raise value.with_traceback(tb)
  File "<template>", line 17, in top-level template code
jinja2.exceptions.UndefinedError: 'dict object' has no attribute 'is_plone5'```

Reproduce the content-type creation flow with the reported Plone CLI and Python versions, then trace the call from plonecli/cli.py through mrbob/configurator.py and mrbob/rendering.py. Inspect the template location reported as line 17 and the variables passed to Jinja2; done means the command completes without the is_plone5 UndefinedError.