THRIFT-2343 Fix tutotial code and codegen for methods without exceptions

Patch: Jens Geyer
diff --git a/tutorial/go/src/client.go b/tutorial/go/src/client.go
index 543d7fb..31376f8 100644
--- a/tutorial/go/src/client.go
+++ b/tutorial/go/src/client.go
@@ -20,10 +20,10 @@
  */
 
 import (
+	"crypto/tls"
 	"fmt"
 	"git.apache.org/thrift.git/lib/go/thrift"
 	"tutorial"
-	"crypto/tls"
 )
 
 func handleClient(client *tutorial.CalculatorClient) (err error) {
@@ -37,12 +37,12 @@
 	work.Op = tutorial.Operation_DIVIDE
 	work.Num1 = 1
 	work.Num2 = 0
-	quotient, ouch, err := client.Calculate(1, work)
+	quotient, err := client.Calculate(1, work)
 	if err != nil {
 		fmt.Println("Error during operation:", err)
 		return err
-	} else if ouch != nil {
-		fmt.Println("Invalid operation:", ouch)
+	//} else if ouch != nil {
+	//	fmt.Println("Invalid operation:", ouch)
 	} else {
 		fmt.Println("Whoa we can divide by 0 with new value:", quotient)
 	}
@@ -50,12 +50,12 @@
 	work.Op = tutorial.Operation_SUBTRACT
 	work.Num1 = 15
 	work.Num2 = 10
-	diff, ouch, err := client.Calculate(1, work)
+	diff, err := client.Calculate(1, work)
 	if err != nil {
 		fmt.Println("Error during operation:", err)
 		return err
-	} else if ouch != nil {
-		fmt.Println("Invalid operation:", ouch)
+	//} else if ouch != nil {
+	//	fmt.Println("Invalid operation:", ouch)
 	} else {
 		fmt.Print("15-10=", diff, "\n")
 	}