build(deps): bump gopkg.in/DataDog/dd-trace-go.v1 from 1.16.0 to 1.16.1 (#3114)

Bumps [gopkg.in/DataDog/dd-trace-go.v1](https://github.com/DataDog/dd-trace-go) from 1.16.0 to 1.16.1.
- [Release notes](https://github.com/DataDog/dd-trace-go/releases)
- [Commits](https://github.com/DataDog/dd-trace-go/compare/v1.16.0...v1.16.1)
Signed-off-by: dependabot-preview[bot] <support@dependabot.com>

go.mod

@@ -58,7 +58,7 @@ require (
 	golang.org/x/xerrors v0.0.0-20190717185122-a985d3407aa7 // indirect
 	google.golang.org/genproto v0.0.0-20190701230453-710ae3a149df // indirect
 	google.golang.org/grpc v1.22.0
-	gopkg.in/DataDog/dd-trace-go.v1 v1.16.0
+	gopkg.in/DataDog/dd-trace-go.v1 v1.16.1
 	gopkg.in/inf.v0 v0.9.1 // indirect
 	k8s.io/api v0.0.0-20190313235455-40a48860b5ab
 	k8s.io/apimachinery v0.0.0-20190313205120-d7deff9243b1

go.sum

@@ -454,6 +454,8 @@ gopkg.in/DataDog/dd-trace-go.v1 v1.15.0 h1:2LhklnAJsRSelbnBrrE5QuRleRDkmOh2JWxOt
 gopkg.in/DataDog/dd-trace-go.v1 v1.15.0/go.mod h1:DVp8HmDh8PuTu2Z0fVVlBsyWaC++fzwVCaGWylTe3tg=
 gopkg.in/DataDog/dd-trace-go.v1 v1.16.0 h1:M+pIoj6uFByW3E8KaAaBmsLl3Sma3JzXZ9eo7ffyX5A=
 gopkg.in/DataDog/dd-trace-go.v1 v1.16.0/go.mod h1:DVp8HmDh8PuTu2Z0fVVlBsyWaC++fzwVCaGWylTe3tg=
+gopkg.in/DataDog/dd-trace-go.v1 v1.16.1 h1:Dngw1zun6yTYFHNdzEWBlrJzFA2QJMjSA2sZ4nH2UWo=
+gopkg.in/DataDog/dd-trace-go.v1 v1.16.1/go.mod h1:DVp8HmDh8PuTu2Z0fVVlBsyWaC++fzwVCaGWylTe3tg=
 gopkg.in/alecthomas/kingpin.v2 v2.2.6/go.mod h1:FMv+mEhP44yOT+4EoQTLFTRgOQ1FBLkstjWtayDeSgw=
 gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
 gopkg.in/check.v1 v1.0.0-20180628173108-788fd7840127 h1:qIbj1fsPNlZgppZ+VLlY7N33q108Sa+fhmuc+sWQYwY=