Description of problem:
Fedora 29's pylint is unable to analyse FreeIPA. It fails with an internal error . It's a known bug and has been addressed in upstream PR https://github.com/PyCQA/pylint/pull/2429 .

Version-Release number of selected component (if applicable):
python3-pylint-2.1.1-1.fc29.noarch

How reproducible:
always

Steps to Reproduce:
1. git clone https://pagure.io/freeipa.git
2. follow BUILD.txt to install dependencies
3. PYTHONPATH=. /usr/bin/python3 -m pylint --rcfile=./pylintrc --load-plugins pylint_plugins ipalib/rpc.py

Actual results:
$ PYTHONPATH=. /usr/bin/python3 -m pylint --rcfile=./pylintrc --load-plugins pylint_plugins ipalib/rpc.py 
Traceback (most recent call last):
  File "/usr/lib64/python3.7/runpy.py", line 193, in _run_module_as_main
    "__main__", mod_spec)
  File "/usr/lib64/python3.7/runpy.py", line 85, in _run_code
    exec(code, run_globals)
  File "/usr/lib/python3.7/site-packages/pylint/__main__.py", line 7, in <module>
    pylint.run_pylint()
  File "/usr/lib/python3.7/site-packages/pylint/__init__.py", line 19, in run_pylint
    Run(sys.argv[1:])
  File "/usr/lib/python3.7/site-packages/pylint/lint.py", line 1394, in __init__
    linter.check(args)
  File "/usr/lib/python3.7/site-packages/pylint/lint.py", line 801, in check
    self._do_check(files_or_modules)
  File "/usr/lib/python3.7/site-packages/pylint/lint.py", line 938, in _do_check
    self.check_astroid_module(ast_node, walker, rawcheckers, tokencheckers)
  File "/usr/lib/python3.7/site-packages/pylint/lint.py", line 1018, in check_astroid_module
    walker.walk(ast_node)
  File "/usr/lib/python3.7/site-packages/pylint/utils.py", line 1162, in walk
    self.walk(child)
  File "/usr/lib/python3.7/site-packages/pylint/utils.py", line 1162, in walk
    self.walk(child)
  File "/usr/lib/python3.7/site-packages/pylint/utils.py", line 1162, in walk
    self.walk(child)
  [Previous line repeated 2 more times]
  File "/usr/lib/python3.7/site-packages/pylint/utils.py", line 1159, in walk
    cb(astroid)
  File "/usr/lib/python3.7/site-packages/pylint/checkers/exceptions.py", line 394, in visit_tryexcept
    self._check_try_except_raise(node)
  File "/usr/lib/python3.7/site-packages/pylint/checkers/exceptions.py", line 373, in _check_try_except_raise
    utils.safe_infer(handler.type))):
  File "/usr/lib/python3.7/site-packages/pylint/checkers/utils.py", line 1011, in is_subclass_of
    return node_b.name in {base.name for base in node_a.bases}
AttributeError: 'NoneType' object has no attribute 'name'


Expected results:
No error

Additional info:
See https://github.com/PyCQA/pylint/pull/2429