update error name

error.go

@@ -13,7 +13,7 @@ func init() {
 	errors[100] = "Key Not Found"
 	errors[101] = "The given PrevValue is not equal to the value of the key"
 	errors[102] = "Not A File"
-	errors[103] = "Reach the max number of machines in the cluster"
+	errors[103] = "Reached the max number of machines in the cluster"
 
 	// Post form related errors
 	errors[200] = "Value is Required in POST form"