Proposed changes

Removing a duplicate topic subscription when using the built-in bridge with Cumulocity.

The duplicate would cause some MQTT brokers (like nanomq) to deliver two messages (one per topic) which would ultimately result in duplicate telemetry data being created in Cumulocity.

The MQTT wildcard, c8y/s/us/#, will also receive messages from c8y/s/us.

Types of changes

• Bugfix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Improvement (general improvements like code refactoring that doesn't explicitly fix a bug or add any new functionality)
• Documentation Update (if none of the other choices apply)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)

Paste Link to the issue

Checklist

• I have read the CONTRIBUTING doc
• I have signed the CLA (in all commits with git commit -s)
• I ran cargo fmt as mentioned in CODING_GUIDELINES
• I used cargo clippy as mentioned in CODING_GUIDELINES
• I have added tests that prove my fix is effective or that my feature works
• I have added necessary documentation (if appropriate)

Further comments