Fix incorrect Onvif filter

[jbpaux]

What this PR does / why we need it:
Fix #597 issue by changing incorrect contains to equality
Special notes for your reviewer:

If applicable:

• this PR has an associated PR with documentation in akri-docs
• this PR contains unit tests
• added code adheres to standard Rust formatting (cargo fmt)
• code builds properly (cargo build)
• code is free of common mistakes (cargo clippy)
• all Akri tests succeed (cargo test)
• inline documentation builds (cargo doc)
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[kate-goldenring]

Thanks for the find and fix!

[diconico07]

/version patch

[diconico07]

Okay, hoped the bot would do magic here, but no. Can you rebase @jbpaux so we have right patch version upgrade and can merge this.

[jbpaux]

/version patch