Remoe health-report module. Because the HealthCollector is based on ConcurrentHashMap. This triggers a performance issue, when the TPS is very high.( > 500)

Fix confirm.

Try to fix coveralls issue. Give it a try.

merge Feature/3.0

Rewrite plugin using new API

Fix ‘tags.get’ cause ClassCastException, because after akka-message/serialize, all tags values are type of String.class.

Add ISerializable interface, and implement this interface in ‘TraceSegment’, ‘TraceSegmentRef’, ‘Span’, ‘LogData’

Feature/3.0