Test coverage improvement (#83)

* Adding tests for getPendingReasons and startMaintenance.

* Added tests for ThriftBinary and ThriftJSON.

* Adding test for NOOP Logger.

examples/client.go

@@ -582,6 +582,21 @@ func main() {
 
 		fmt.Print(result.String())
 
+	case "getPendingReasons":
+		fmt.Println("Getting pending reasons")
+		taskQ := &aurora.TaskQuery{
+			Role:        &job.JobKey().Role,
+			Environment: &job.JobKey().Environment,
+			JobName:     &job.JobKey().Name,
+		}
+		reasons, err := r.GetPendingReason(taskQ)
+		if err != nil {
+			log.Fatalf("error: %+v\n ", err)
+		}
+
+		fmt.Printf("length: %d\n ", len(reasons))
+		fmt.Printf("tasks: %+v\n", reasons)
+
 	case "getJobs":
 		fmt.Println("GetJobs...role: ", role)
 		_, result, err := r.GetJobs(role)