Added tests

Signed-off-by: Rahman Mousavian <rahman.mousavian@oracle.com>

collector/scheduled_task_test.go

@@ -0,0 +1,9 @@
+package collector
+
+import (
+	"testing"
+)
+
+func BenchmarkScheduledTaskCollector(b *testing.B) {
+	benchmarkCollector(b, "scheduled_task", NewScheduledTask)
+}