7a0b8ae Issue 50032 - Fix deprecation warnings in tests

Authored and Committed by vashirov 4 months ago
    Issue 50032 - Fix deprecation warnings in tests
    Bug Description:
    Deprecation warnings are issued by Python for the following changes:
    1. https://docs.python.org/3/whatsnew/3.6.html#deprecated-python-behavior
    https://bugs.python.org/issue27364 - Deprecate invalid escape sequences in str/bytes
    2. https://docs.python.org/3/whatsnew/3.7.html#deprecated-python-behavior
    https://bugs.python.org/issue25988 - collections.abc.Indexable
    3. https://docs.python.org/3/library/logging.html#logging.warning
    https://bugs.python.org/issue13235 - logging.warn() is not documented
    Fix Description:
    1. Use correct escape sequences or raw strings where needed.
    2. Import Callable from collections.abc instead of collections module directly.
    3. Use logging.warning() instead of logging.warn().
    Fixes https://pagure.io/389-ds-base/issue/50032
    Reviewed by: mreynolds, spichugi
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