Switch to "WARNING" logging level by default

[arm4b]

Switch the default logging level to WARNING instead of DEBUG for BitOps.

As we're starting to show the BitOps to others, be mindful of what data we show as logs, - users should be getting only the important messages, excluding all the noise.

Somewhat relevant to https://github.com/bitovi/bitops/issues/270, which highlights a bigger problem with the log formatting standards.

[runforesight[bot]]

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[PhillypHenning]

Straight forward, looks good to me

I feel like we remove the newline for for combined_output in process.stdout: every PR.... 🤷‍♂️

[mcascone]

YES the output is WAY too noisy!