Add application test to subscription example

Author: felipe-gdr-atlassian

subscription-example/src/test/java/com/graphql/java/subscription/ApplicationTests.java

@@ -0,0 +1,16 @@
+package com.graphql.java.subscription;
+
+import org.junit.Test;
+import org.junit.runner.RunWith;
+import org.springframework.boot.test.context.SpringBootTest;
+import org.springframework.test.context.junit4.SpringRunner;
+
+@RunWith(SpringRunner.class)
+@SpringBootTest
+public class ApplicationTests {
+
+    @Test
+    public void contextLoads() {
+    }
+
+}