Unregister HealthCheckVerticles from shared map

[s4heid]

Is there an existing issue for this?

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Current Behavior

HealthCheckVerticles use a similar mechanism like EntityVerticles for data exchange. They register in NeonBee's shared map by their (unique) eventbus address, but never unregister. If a node dies, the entry remains in the shared map and will be tried to be contacted if data is requested. This means that the shared map fills up after some time with verticle addresses which are no longer reachable.

Expected Behavior

#159 addresses this issue for entity verticles. Once this issue is resolved, the unregistering mechanism should be reused for HealthCheckVerticles.

Steps To Reproduce

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Environment

all environments

Relevant log output

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Anything else?

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