Add App.class configuration to test

With this you won't have problems to perform your test. I was facing problems with this test to start up spring context.

Author: danielbarcellos

src/test/java/com/boylegu/springboot_vue/SpringbootVueApplicationTests.java

@@ -30,7 +30,8 @@
  */
 
 @RunWith(SpringJUnit4ClassRunner.class)
-@ContextConfiguration(classes = MockServletContext.class)
+//@ContextConfiguration(classes = MockServletContext.class)
+@SpringBootTest(classes = { App.class })
 @WebAppConfiguration
 public class SpringbootVueApplicationTests {