Mesos marathon module (#1107)

* mesos marathon demo

* Updated DockerFile to point to maven target

* Pointed to baeldung docker repository

* Added file permissions for Dockerise script

mesos-marathon/src/test/java/com/mogronalol/DemoApplicationTests.java

@@ -0,0 +1,34 @@
+package com.mogronalol;
+
+import org.junit.Before;
+import org.junit.Test;
+import org.junit.runner.RunWith;
+import org.springframework.boot.context.embedded.LocalServerPort;
+import org.springframework.boot.test.context.SpringBootTest;
+import org.springframework.test.context.ContextConfiguration;
+import org.springframework.test.context.junit4.SpringJUnit4ClassRunner;
+import org.springframework.web.client.RestTemplate;
+
+import static org.assertj.core.api.Assertions.assertThat;
+
+@RunWith(SpringJUnit4ClassRunner.class)
+@SpringBootTest(classes = {DemoApplication.class}, webEnvironment = SpringBootTest.WebEnvironment.RANDOM_PORT)
+public class DemoApplicationTests {
+
+    private RestTemplate restTemplate;
+
+    @LocalServerPort
+    private int port;
+
+    @Before
+    public void setUp() {
+        restTemplate = new RestTemplate();
+    }
+
+    @Test
+    public void contextLoads() {
+        final String result = restTemplate.getForObject("http://localhost:" + port + "/", String.class);
+        assertThat(result).isEqualTo("Hello world");
+    }
+
+}