Update span log level. (#150)

Promote `asyncRequests()` span to info level so it's not filtered out by default.

go.mod

@@ -7,7 +7,7 @@ require (
 	github.com/davecgh/go-spew v1.1.1
 	github.com/grpc-ecosystem/grpc-gateway/v2 v2.11.2
 	github.com/hashicorp/memberlist v0.3.1
-	github.com/mailgun/holster/v4 v4.7.0
+	github.com/mailgun/holster/v4 v4.7.1
 	github.com/miekg/dns v1.1.49
 	github.com/pkg/errors v0.9.1
 	github.com/prometheus/client_golang v1.13.0

go.sum

@@ -296,8 +296,8 @@ github.com/kr/pty v1.1.1/go.mod h1:pFQYn66WHrOpPYNljwOMqo10TkYh1fy3cYio2l3bCsQ=
 github.com/kr/text v0.1.0/go.mod h1:4Jbv+DJW3UT/LiOwJeYQe1efqtUx/iVham/4vfdArNI=
 github.com/kr/text v0.2.0 h1:5Nx0Ya0ZqY2ygV366QzturHI13Jq95ApcVaJBhpS+AY=
 github.com/kr/text v0.2.0/go.mod h1:eLer722TekiGuMkidMxC/pM04lWEeraHUUmBw8l2grE=
-github.com/mailgun/holster/v4 v4.7.0 h1:eWAqHDNqViw3+uG46J+eMDW9E5dro56RSMOd9RZ9090=
-github.com/mailgun/holster/v4 v4.7.0/go.mod h1:cokuSdxtRPgySxSozaFzDt+TGixnKrKj3ZO6GtYubQo=
+github.com/mailgun/holster/v4 v4.7.1 h1:aDq1tDKRnSZl5ZgZzg3cHz6eSj8tVvAy6faOcDhDQHA=
+github.com/mailgun/holster/v4 v4.7.1/go.mod h1:cokuSdxtRPgySxSozaFzDt+TGixnKrKj3ZO6GtYubQo=
 github.com/mailru/easyjson v0.0.0-20190614124828-94de47d64c63/go.mod h1:C1wdFJiN94OJF2b5HbByQZoLdCWB1Yqtg26g4irojpc=
 github.com/mailru/easyjson v0.0.0-20190626092158-b2ccc519800e/go.mod h1:C1wdFJiN94OJF2b5HbByQZoLdCWB1Yqtg26g4irojpc=
 github.com/mattn/go-colorable v0.0.9/go.mod h1:9vuHe8Xs5qXnSaW/c/ABM9alt+Vo+STaOChaDxuIBZU=

gubernator.go

@@ -336,7 +336,7 @@ func (s *V1Instance) asyncRequests(ctx context.Context, req *AsyncReq) {
 	var attempts int
 	var err error
 
-	ctx = tracing.StartScopeDebug(ctx)
+	ctx = tracing.StartScope(ctx)
 	defer tracing.EndScope(ctx, nil)
 	span := trace.SpanFromContext(ctx)
 	span.SetAttributes(