Fix incomplete close mechanism in connectionManager

[prjanitor]

The close() method in connectionManager was returning early if the publisherConnection.close() failed, which prevented the consumerConnection.close() from being called. This could lead to resources not being properly released during shutdown.

The fix ensures that both connections attempt to close, although it currently prioritizes returning the publisher error if one occurs. A more robust implementation might use a multi-error approach, but this fixes the immediate issue of masking the consumer closure call.

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