Add value alias for SpringApplicationConfiguration

Given that Spring Boot uses java config accross the board, a new `value`
attribute is now aliased to the existing `classes` attribute such that
one could write the following:

@SpringApplicationConfiguration(MyConfig.class)
public class MyTest {}

Closes gh-3635

spring-boot-samples/spring-boot-sample-actuator/src/test/java/sample/actuator/EndpointsPropertiesSampleActuatorApplicationTests.java

@@ -42,7 +42,7 @@ import static org.junit.Assert.assertTrue;
  * @author Dave Syer
  */
 @RunWith(SpringJUnit4ClassRunner.class)
-@SpringApplicationConfiguration(classes = SampleActuatorApplication.class)
+@SpringApplicationConfiguration(SampleActuatorApplication.class)
 @WebAppConfiguration
 @IntegrationTest("server.port=0")
 @DirtiesContext

spring-boot-samples/spring-boot-sample-actuator/src/test/java/sample/actuator/ManagementAddressActuatorApplicationTests.java

@@ -41,7 +41,7 @@ import static org.junit.Assert.assertTrue;
  * @author Dave Syer
  */
 @RunWith(SpringJUnit4ClassRunner.class)
-@SpringApplicationConfiguration(classes = SampleActuatorApplication.class)
+@SpringApplicationConfiguration(SampleActuatorApplication.class)
 @WebAppConfiguration
 @IntegrationTest({ "server.port=0", "management.port=0", "management.address=127.0.0.1",
 		"management.context-path:/admin" })

spring-boot-samples/spring-boot-sample-actuator/src/test/java/sample/actuator/ManagementPathSampleActuatorApplicationTests.java

@@ -40,7 +40,7 @@ import static org.junit.Assert.assertTrue;
  * @author Dave Syer
  */
 @RunWith(SpringJUnit4ClassRunner.class)
-@SpringApplicationConfiguration(classes = SampleActuatorApplication.class)
+@SpringApplicationConfiguration(SampleActuatorApplication.class)
 @WebAppConfiguration
 @IntegrationTest({ "server.port=0", "management.context_path=/admin" })
 @DirtiesContext

spring-boot-samples/spring-boot-sample-actuator/src/test/java/sample/actuator/ManagementPortSampleActuatorApplicationTests.java

@@ -41,7 +41,7 @@ import static org.junit.Assert.assertTrue;
  * @author Dave Syer
  */
 @RunWith(SpringJUnit4ClassRunner.class)
-@SpringApplicationConfiguration(classes = SampleActuatorApplication.class)
+@SpringApplicationConfiguration(SampleActuatorApplication.class)
 @WebAppConfiguration
 @IntegrationTest({ "server.port=0", "management.port=0" })
 @DirtiesContext

spring-boot-samples/spring-boot-sample-actuator/src/test/java/sample/actuator/NoManagementSampleActuatorApplicationTests.java

@@ -40,7 +40,7 @@ import static org.junit.Assert.assertEquals;
  * @author Dave Syer
  */
 @RunWith(SpringJUnit4ClassRunner.class)
-@SpringApplicationConfiguration(classes = SampleActuatorApplication.class)
+@SpringApplicationConfiguration(SampleActuatorApplication.class)
 @WebAppConfiguration
 @IntegrationTest({ "server.port=0", "management.port=-1" })
 @DirtiesContext

spring-boot-samples/spring-boot-sample-actuator/src/test/java/sample/actuator/NonSensitiveHealthTests.java

@@ -37,7 +37,7 @@ import static org.junit.Assert.assertFalse;
  * @author Phillip Webb
  */
 @RunWith(SpringJUnit4ClassRunner.class)
-@SpringApplicationConfiguration(classes = SampleActuatorApplication.class)
+@SpringApplicationConfiguration(SampleActuatorApplication.class)
 @WebAppConfiguration
 @IntegrationTest({ "server.port=0", "endpoints.health.sensitive=false" })
 @DirtiesContext

spring-boot-samples/spring-boot-sample-actuator/src/test/java/sample/actuator/SampleActuatorApplicationTests.java

@@ -49,7 +49,7 @@ import static org.junit.Assert.assertTrue;
  * @author Dave Syer
  */
 @RunWith(SpringJUnit4ClassRunner.class)
-@SpringApplicationConfiguration(classes = SampleActuatorApplication.class)
+@SpringApplicationConfiguration(SampleActuatorApplication.class)
 @WebAppConfiguration
 @IntegrationTest("server.port=0")
 @DirtiesContext

spring-boot-samples/spring-boot-sample-actuator/src/test/java/sample/actuator/ServletPathSampleActuatorApplicationTests.java

@@ -40,7 +40,7 @@ import static org.junit.Assert.assertTrue;
  * @author Dave Syer
  */
 @RunWith(SpringJUnit4ClassRunner.class)
-@SpringApplicationConfiguration(classes = SampleActuatorApplication.class)
+@SpringApplicationConfiguration(SampleActuatorApplication.class)
 @WebAppConfiguration
 @IntegrationTest({ "server.port=0", "server.servletPath=/spring" })
 @DirtiesContext

spring-boot-samples/spring-boot-sample-actuator/src/test/java/sample/actuator/ServletPathUnsecureSampleActuatorApplicationTests.java

@@ -40,7 +40,7 @@ import static org.junit.Assert.assertFalse;
  * @author Dave Syer
  */
 @RunWith(SpringJUnit4ClassRunner.class)
-@SpringApplicationConfiguration(classes = SampleActuatorApplication.class)
+@SpringApplicationConfiguration(SampleActuatorApplication.class)
 @WebAppConfiguration
 @IntegrationTest({ "server.port:0", "security.basic.enabled:false",
 		"server.servletPath:/spring" })

spring-boot-samples/spring-boot-sample-actuator/src/test/java/sample/actuator/ShutdownSampleActuatorApplicationTests.java

@@ -41,7 +41,7 @@ import static org.junit.Assert.assertTrue;
  * @author Dave Syer
  */
 @RunWith(SpringJUnit4ClassRunner.class)
-@SpringApplicationConfiguration(classes = SampleActuatorApplication.class)
+@SpringApplicationConfiguration(SampleActuatorApplication.class)
 @WebAppConfiguration
 @IntegrationTest("server.port=0")
 @DirtiesContext

spring-boot-samples/spring-boot-sample-actuator/src/test/java/sample/actuator/UnsecureManagementSampleActuatorApplicationTests.java

@@ -42,7 +42,7 @@ import static org.junit.Assert.assertTrue;
  * @author Dave Syer
  */
 @RunWith(SpringJUnit4ClassRunner.class)
-@SpringApplicationConfiguration(classes = SampleActuatorApplication.class)
+@SpringApplicationConfiguration(SampleActuatorApplication.class)
 @WebAppConfiguration
 @IntegrationTest({ "server.port:0", "management.security.enabled:false" })
 @DirtiesContext

spring-boot-samples/spring-boot-sample-actuator/src/test/java/sample/actuator/UnsecureSampleActuatorApplicationTests.java

@@ -40,7 +40,7 @@ import static org.junit.Assert.assertFalse;
  * @author Dave Syer
  */
 @RunWith(SpringJUnit4ClassRunner.class)
-@SpringApplicationConfiguration(classes = SampleActuatorApplication.class)
+@SpringApplicationConfiguration(SampleActuatorApplication.class)
 @WebAppConfiguration
 @IntegrationTest({ "server.port:0", "security.basic.enabled:false" })
 @DirtiesContext