Make registry heartbeat TTL configurable #88
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Saw a TODO in
kv_registry.gothat said that it'd be nice if the heartbeat TTL was configurable, so this change acts on that TODO.I've made all registries that currently take options take in what the heartbeat TTL value should be, and have exposed a
HeartbeatTTL()function toenvironmentsuch that this value is appropriately passed tocontext.WithTimeoutwhile callingHeartbeat()on the environment object. This was previously using the hardcoded default of 5 seconds.cc @richardartoul