Bandit fails when using importlib with named arguments

[mkielar]

Describe the bug
A clear and concise description of what the bug is.

To Reproduce
Steps to reproduce the behavior:

1. Save this code in a test.py file

   import importlib
   importlib.import_module(name=foo, package='bar.baz')
   

2. Run:

   > bandit test.py
   [main]  INFO    profile include tests: None
   [main]  INFO    profile exclude tests: None
   [main]  INFO    cli include tests: None
   [main]  INFO    cli exclude tests: None
   [main]  INFO    running on Python 3.8.3
   [node_visitor]  INFO    Unable to find qualified name for module: test.py
   [tester]        ERROR   Bandit internal error running: blacklist on file test.py at line 4: list index out of rangeTraceback (most recent call last):
     File "[MASKED]/venv/lib64/python3.8/site-packages/bandit/core/tester.py", line 52, in run_tests
       result = test(context, test._config)
     File "[MASKED]/venv/lib64/python3.8/site- packages/bandit/core/blacklisting.py", line 50, in blacklist
       name = context.call_args[0]
   IndexError: list index out of range
   

3. Observe the error

Expected behavior
I'd expect it to scan the file with no errors.

Bandit version

bandit 1.7.0
  python version = 3.8.3 (default, Feb 26 2020, 00:00:00) [GCC 9.3.1 20200408 (Red Hat 9.3.1-2)]

Additional context
This line: https://github.com/PyCQA/bandit/blob/master/bandit/core/blacklisting.py#L50 only expects module name passed directly, and not as named argument.

[ericwb]

Appears to be fixed with #701