make checkin intervals configurable and remove extra nats conn

agent/utils.go

@@ -322,3 +322,12 @@ func createTmpFile() (*os.File, error) {
 	}
 	return f, nil
 }
+
+func stringInSlice(a string, list []string) bool {
+	for _, b := range list {
+		if b == a {
+			return true
+		}
+	}
+	return false
+}