Change invitations to use service tracing provider

This changes the invitations service to use the service tracing provider.

services/invitations/pkg/service/v0/tracing.go

@@ -4,20 +4,21 @@ import (
 	"context"
 
 	"github.com/owncloud/ocis/v2/services/invitations/pkg/invitations"
-	invitationstracing "github.com/owncloud/ocis/v2/services/invitations/pkg/tracing"
 	"go.opentelemetry.io/otel/attribute"
 	"go.opentelemetry.io/otel/trace"
 )
 
 // NewTracing returns a service that instruments traces.
-func NewTracing(next Service) Service {
+func NewTracing(next Service, tp trace.TracerProvider) Service {
 	return tracing{
 		next: next,
+		tp:   tp,
 	}
 }
 
 type tracing struct {
 	next Service
+	tp   trace.TracerProvider
 }
 
 // Invite implements the Service interface.
@@ -27,8 +28,9 @@ func (t tracing) Invite(ctx context.Context, invitation *invitations.Invitation)
 		trace.WithAttributes(
 			attribute.KeyValue{
 				Key: "invitation", Value: attribute.StringValue(invitation.InvitedUserEmailAddress),
-			})}
-	ctx, span := invitationstracing.TraceProvider.Tracer("invitations").Start(ctx, "Invite", spanOpts...)
+			}),
+	}
+	ctx, span := t.tp.Tracer("invitations").Start(ctx, "Invite", spanOpts...)
 	defer span.End()
 
 	return t.next.Invite(ctx, invitation)