XML Message Encoder and tests class added

-added XMLMessageEncoder to encode xml files into byte array
-added test class for xml encoder
-added regatta.xml to the test resources

#story[778, 782]

src/test/java/XMLMessageEncoderTest.java

@@ -0,0 +1,54 @@
+import org.junit.Assert;
+import org.junit.Before;
+import org.junit.Test;
+import seng302.XMLMessageEncoder;
+
+import java.io.*;
+
+/**
+ * Created by hba56 on 19/04/17.
+ */
+public class XMLMessageEncoderTest {
+    @Test
+    public void getByteArrayTest(){
+        StringBuilder xmlString;
+        try{
+            BufferedReader br = new BufferedReader(new InputStreamReader(
+                    this.getClass().getResourceAsStream(("raceXML/Regatta.xml"))));
+            String line;
+            xmlString = new StringBuilder();
+            while((line=br.readLine())!= null){
+                xmlString.append(line.trim());
+            }
+            XMLMessageEncoder testEncoder = new  XMLMessageEncoder((byte)1, (short)1, System.currentTimeMillis(), (byte)7, (short)1, (short)xmlString.length(), xmlString.toString());
+
+            byte[] encodedXML = testEncoder.getByteArray();
+
+            //1 + 2 + 6 + 1 + 2 + 2 + 374
+            Assert.assertEquals(388, encodedXML.length);
+        }catch (IOException e){
+            System.out.println(e);
+        }
+    }
+
+    @Test
+    public void getByteArrayNullTest(){
+        StringBuilder xmlString;
+        try{
+            BufferedReader br = new BufferedReader(new InputStreamReader(
+                    this.getClass().getResourceAsStream(("raceXML/Regatta.xml"))));
+            String line;
+            xmlString = new StringBuilder();
+            while((line=br.readLine())!= null){
+                xmlString.append(line.trim());
+            }
+            XMLMessageEncoder testEncoder = new  XMLMessageEncoder((byte)1, (short)1, System.currentTimeMillis(), (byte)7, (short)1, (short)1, xmlString.toString());
+
+            byte[] encodedXML = testEncoder.getByteArray();
+
+            Assert.assertEquals(null, encodedXML);
+        }catch (IOException e){
+            System.out.println(e);
+        }
+    }
+}

src/test/resources/raceXML/Regatta.xml

@@ -0,0 +1,12 @@
+<?xml version="1.0" encoding="utf-8"?>
+
+<RegattaConfig>
+    <RegattaID>1</RegattaID>
+    <RegattaName>Seng302 Mock Test</RegattaName>
+    <CourseName>Bermuda AC35</CourseName>
+    <CentralLatitude>-32.296577</CentralLatitude>
+    <CentralLongitude>64.854304</CentralLongitude>
+    <CentralAltitude>0.00</CentralAltitude>
+    <UtcOffset>-4</UtcOffset>
+    <MagneticVariation>-14.78</MagneticVariation>
+</RegattaConfig>