Change access modifiers in ValidationMessage

Make getArguments public and setArguments package-private.

Author: ehrmann

src/main/java/com/networknt/schema/ValidationMessage.java

@@ -45,11 +45,11 @@ void setPath(String path) {
         this.path = path;
     }
 
-    String[] getArguments() {
+    public String[] getArguments() {
         return arguments;
     }
 
-    public void setArguments(String[] arguments) {
+    void setArguments(String[] arguments) {
         this.arguments = arguments;
     }