Fix obfuscator options being converted into bytes rather than string

[alexbarksdale]

What does this PR do?

Fixes obfuscator options being converted into bytes rather than string. Error found:

2021-07-12 17:14:20 UTC | CORE | WARN | (pkg/collector/python/datadog_agent.go:124 in LogMessage) | mysql:c94166e47fbb1ecc | (statements.py:190) | Failed to obfuscate query 'SELECT ?': argument 2 must be str, not bytes

Motivation

Additional Notes

Review checklist (to be filled by reviewers)

• Feature or bugfix MUST have appropriate tests (unit, integration, e2e)
• PR title must be written as a CHANGELOG entry (see why)
• Files changes must correspond to the primary purpose of the PR as described in the title (small unrelated changes should have their own PR)
• PR must have changelog/ and integration/ labels attached

[codecov]

Codecov Report

Merging #9676 (5b33a18) into master (c94ba90) will increase coverage by 0.00%.
The diff coverage is 100.00%.

Flag	Coverage Δ
mysql	85.27% <100.00%> (+0.15%)	⬆️

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