Use opentracing-1.2.0. (#2226)
Use opentracing-1.2.0. (#2226)

Signed-off-by: Ryan Burn <9c65be2991baa078b5b062fc60daae1e9790bde5@gmail.com>
istio/envoy,istio/envoy,istio/envoy,craffert0/envoy,jrajahalme/envoy,eklitzke/envoy,lizan/envoy,istio/envoy,envoyproxy/envoy-wasm,jrajahalme/envoy,sebrandon1/envoy,lizan/envoy,dnoe/envoy,lizan/envoy,envoyproxy/envoy,lyft/envoy,sebrandon1/envoy,eklitzke/envoy,lizan/envoy,lizan/envoy,lyft/envoy,sebrandon1/envoy,dnoe/envoy,sebrandon1/envoy,jrajahalme/envoy,eklitzke/envoy,craffert0/envoy,envoyproxy/envoy-wasm,envoyproxy/envoy-wasm,envoyproxy/envoy,jrajahalme/envoy,istio/envoy,istio/envoy,dnoe/envoy,envoyproxy/envoy,sebrandon1/envoy,lyft/envoy,envoyproxy/envoy,envoyproxy/envoy,envoyproxy/envoy,envoyproxy/envoy,craffert0/envoy,jrajahalme/envoy,envoyproxy/envoy,envoyproxy/envoy,eklitzke/envoy,lyft/envoy,craffert0/envoy,envoyproxy/envoy-wasm,lyft/envoy,lyft/envoy,dnoe/envoy,eklitzke/envoy,dnoe/envoy,istio/envoy,lizan/envoy,envoyproxy/envoy,envoyproxy/envoy-wasm,envoyproxy/envoy-wasm,jrajahalme/envoy,envoyproxy/envoy-wasm,eklitzke/envoy,envoyproxy/envoy,envoyproxy/envoy