Start enterprise service on boot / placeholders

Adds the enterprise service to the agent's boot process. A few
placeholders have been added because it's not quite clear how we should
generate ProductIDs and ClusterIDs for Telegraf

agent/agent.go

@@ -14,6 +14,7 @@ import (
 	"github.com/influxdata/telegraf"
 	"github.com/influxdata/telegraf/internal/config"
 	"github.com/influxdata/telegraf/internal/models"
+	"github.com/influxdata/telegraf/services/enterprise"
 )
 
 // Agent runs telegraf and collects data based on the given config
@@ -328,6 +329,9 @@ func (a *Agent) Run(shutdown chan struct{}) error {
 	}
 	ticker := time.NewTicker(a.Config.Agent.Interval.Duration)
 
+	ent := enterprise.NewEnterprise(a.Config.Agent.Enterprise, a.Config.Agent.Hostname, shutdown)
+	go ent.Open()
+
 	wg.Add(1)
 	go func() {
 		defer wg.Done()