[SQL] SPARK-1571 Mistake in java example code

Author: Michael Armbrust <michael@databricks.com>

Closes #496 from marmbrus/javaBeanBug and squashes the following commits:

644fedd [Michael Armbrust] Bean methods must be public.

docs/sql-programming-guide.md

@@ -143,19 +143,19 @@ public static class Person implements Serializable {
   private String name;
   private int age;
 
-  String getName() {
+  public String getName() {
     return name;
   }
 
-  void setName(String name) {
+  public void setName(String name) {
     this.name = name;
   }
 
-  int getAge() {
+  public int getAge() {
     return age;
   }
 
-  void setAge(int age) {
+  public void setAge(int age) {
     this.age = age;
   }
 }

examples/src/main/java/org/apache/spark/examples/sql/JavaSparkSQL.java

@@ -34,19 +34,19 @@ public class JavaSparkSQL {
     private String name;
     private int age;
 
-    String getName() {
+    public String getName() {
       return name;
     }
 
-    void setName(String name) {
+    public void setName(String name) {
       this.name = name;
     }
 
-    int getAge() {
+    public int getAge() {
       return age;
     }
 
-    void setAge(int age) {
+    public void setAge(int age) {
       this.age = age;
     }
   }