.credentials file section name is case sensitive

[ctcampbell]

In our help docs we use lowercase for the .credentials section name suggestions, which results in an error on first run due to the default lookup being set to DEFAULT.

app = Application('verademo-java')
Traceback (most recent call last):
  File "/Users/ccampbell/.pyenv/versions/3.9.0/lib/python3.9/configparser.py", line 789, in get
    value = d[option]
  File "/Users/ccampbell/.pyenv/versions/3.9.0/lib/python3.9/collections/__init__.py", line 941, in __getitem__
    return self.__missing__(key)            # support subclasses that define __missing__
  File "/Users/ccampbell/.pyenv/versions/3.9.0/lib/python3.9/collections/__init__.py", line 933, in __missing__
    raise KeyError(key)
KeyError: 'veracode_api_key_id'

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "/Users/ccampbell/Source/Veracode/veracode-python/veracode/application.py", line 22, in __new__
    return ExistingApplication(name, sandbox, build)
  File "/Users/ccampbell/Source/Veracode/veracode-python/veracode/application.py", line 146, in __init__
    self.info = self._get_app_by_name(app_name).application
  File "/Users/ccampbell/Source/Veracode/veracode-python/veracode/application.py", line 179, in _get_app_by_name
    apps = SDK.upload.GetAppList()
  File "/Users/ccampbell/Source/Veracode/veracode-python/veracode/SDK/upload.py", line 14, in __init__
    super(GetAppList, self).__init__(
  File "/Users/ccampbell/Source/Veracode/veracode-python/veracode/SDK/core.py", line 41, in __init__
    res = getattr(getattr(getattr(API, module),cls),fn)(**args)
  File "/Users/ccampbell/Source/Veracode/veracode-python/veracode/API/upload.py", line 15, in get
    return self().GET(args, format='text')
  File "/Users/ccampbell/Source/Veracode/veracode-python/veracode/API/upload.py", line 11, in __init__
    super(GetAppList, self).__init__('getapplist.do', 5.0)
  File "/Users/ccampbell/Source/Veracode/veracode-python/veracode/API/core.py", line 31, in __init__
    self.__api_id = conf.get(self.profile, 'VERACODE_API_KEY_ID')
  File "/Users/ccampbell/.pyenv/versions/3.9.0/lib/python3.9/configparser.py", line 792, in get
    raise NoOptionError(option, section)
configparser.NoOptionError: No option 'veracode_api_key_id' in section: 'DEFAULT'