add base64 0 buffer test (#362)
add base64 0 buffer test (#362)


sebrandon1/envoy,jrajahalme/envoy,rlazarus/envoy,htuch/envoy,craffert0/envoy,jrajahalme/envoy,eklitzke/envoy,sebrandon1/envoy,istio/envoy,dnoe/envoy,istio/envoy,lyft/envoy,istio/envoy,jrajahalme/envoy,craffert0/envoy,timperrett/envoy,dnoe/envoy,lyft/envoy,istio/envoy,amalgam8/envoy,fengli79/envoy,envoyproxy/envoy-wasm,tschroed/envoy,lizan/envoy,istio/envoy,istio/envoy,sebrandon1/envoy,lizan/envoy,lizan/envoy,envoyproxy/envoy,eklitzke/envoy,envoyproxy/envoy,envoyproxy/envoy,tdmackey/envoy,envoyproxy/envoy,envoyproxy/envoy-wasm,eklitzke/envoy,lyft/envoy,fengli79/envoy,dnoe/envoy,timperrett/envoy,eklitzke/envoy,htuch/envoy,fengli79/envoy,envoyproxy/envoy,craffert0/envoy,envoyproxy/envoy-wasm,eklitzke/envoy,fengli79/envoy,eklitzke/envoy,envoyproxy/envoy,tdmackey/envoy,envoyproxy/envoy,envoyproxy/envoy-wasm,envoyproxy/envoy,tdmackey/envoy,envoyproxy/envoy,htuch/envoy,lyft/envoy,envoyproxy/envoy,amalgam8/envoy,rlazarus/envoy,timperrett/envoy,sebrandon1/envoy,lizan/envoy,rlazarus/envoy,istio/envoy,lyft/envoy,tschroed/envoy,dnoe/envoy,dnoe/envoy,jrajahalme/envoy,tschroed/envoy,lizan/envoy,tdmackey/envoy,craffert0/envoy,amalgam8/envoy,envoyproxy/envoy-wasm,jrajahalme/envoy,envoyproxy/envoy-wasm,envoyproxy/envoy,timperrett/envoy,envoyproxy/envoy,jrajahalme/envoy,envoyproxy/envoy-wasm,sebrandon1/envoy,amalgam8/envoy,lyft/envoy,lizan/envoy,rlazarus/envoy