MapperParsingException on elasticsearch when address annotation present

[codefromthecrypt]

"sa" and "ca" binary annotations are of type boolean, not string. We should make sure we only index string ones, if possible.

[Titania] failed to execute [index {[zipkin-2016-08-16][span][AVaRHcergLmKHNBk-IeX], source[{"timestamp_millis":1471313463199,"traceId":"7a00d01b5b3abafe","name":"get","id":"7d8e079b9a44cd82","parentId":"7a00d01b5b3abafe","timestamp":1471313463199000,"duration":3000,"annotations":[{"timestamp":1471313463199000,"value":"cs","endpoint":{"serviceName":"frontend","ipv4":"127.0.0.1"}},{"timestamp":1471313463199000,"value":"ws","endpoint":{"serviceName":"frontend","ipv4":"127.0.0.1"}},{"timestamp":1471313463201000,"value":"wr","endpoint":{"serviceName":"frontend","ipv4":"127.0.0.1"}},{"timestamp":1471313463202000,"value":"cr","endpoint":{"serviceName":"frontend","ipv4":"127.0.0.1"}}],"binaryAnnotations":[{"key":"ca","value":true,"endpoint":{"serviceName":"frontend","ipv4":"127.0.0.1","port":63005}},{"key":"clnt/finagle.version","value":"6.36.0","endpoint":{"serviceName":"frontend","ipv4":"127.0.0.1"}},{"key":"http.uri","value":"/api","endpoint":{"serviceName":"frontend","ipv4":"127.0.0.1"}},{"key":"sa","value":true,"endpoint":{"serviceName":"frontend","ipv4":"127.0.0.1","port":9000}}]}]}] on [[zipkin-2016-08-16][1]]
MapperParsingException[failed to parse]; nested: IllegalArgumentException[mapper [binaryAnnotations.value] of different type, current_type [boolean], merged_type [string]];

[codefromthecrypt]

note: this is easy to reproduce if you use JMH or similar to pummel the elasticsearch server :)

[codefromthecrypt]

seems related elastic/elasticsearch#12366