HAM-135 - add '.' to config search paths

[dmeecs]

Per readme, need to search the current working directory for config.ini or credentials.ini.

Found that given the cli tool is using the library click-config, I see that it's test cases include a test case that specify '.' in the search path: https://github.com/click-contrib/click-configfile/blob/main/tests/functional/test_basics.py#L89

# -----------------------------------------------------------------------------
# TEST CANDIDATE 3: With config_searchpath
# -----------------------------------------------------------------------------
class ConfigFileProcessor3(ConfigFileReader):
    config_files = ["hello3.ini"]
    config_searchpath = [".", "config/profile"]
    config_section_schemas = [
        ConfigSectionSchema1.Hello,
    ]

Thus I added that to the same appropriate place in this repo. I tested this change locally by trying cloudsmith whoami and cloudsmith check service on master with config files in place. Master did not pick up the values in the config files. I then switched to this branch, repeated the test, and this branch does pickup values from the config files.

[codeclimate]

Code Climate has analyzed commit 2d7eb2c and detected 0 issues on this pull request.

The test coverage on the diff in this pull request is 0.0% (50% is the threshold).

This pull request will bring the total coverage in the repository to 0.9% (0.0% change).

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[paddycarey]

LGTM