Move tests to spring-test module

When Spr9799XmlConfigTests and Spr9799AnnotationConfigTests were
created, there were issues with the classpath related to slf4j
dependencies that made it impossible for these classes to reside in the
spring-test module. Consequently, these tests were added to the
spring-test-mvc module. However, the issues with slf4j have since been
resolved in the Gradle build, and this commit therefore moves these test
classes to the spring-test module where they belong.

Issue: SPR-9799

spring-test/src/test/java/org/springframework/test/context/junit4/spr9799/Spr9799AnnotationConfigTests.java

@@ -27,11 +27,7 @@ import org.springframework.web.servlet.config.annotation.EnableWebMvc;
 /**
  * Integration tests used to assess claims raised in
  * <a href="https://jira.springsource.org/browse/SPR-9799" target="_blank">SPR-9799</a>.
- * 
- * <p>Note: this test class would normally reside in the {@code spring-test} source
- * tree; however, due to classpath issues with slf4j, this class must reside in
- * the {@code spring-test-mvc} source tree.
- * 
+ *
  * @author Sam Brannen
  * @since 3.2
  * @see Spr9799XmlConfigTests

spring-test/src/test/java/org/springframework/test/context/junit4/spr9799/Spr9799XmlConfigTests.java

@@ -24,11 +24,7 @@ import org.springframework.test.context.junit4.SpringJUnit4ClassRunner;
 /**
  * Integration tests used to assess claims raised in
  * <a href="https://jira.springsource.org/browse/SPR-9799" target="_blank">SPR-9799</a>.
- * 
- * <p>Note: this test class would normally reside in the {@code spring-test} source
- * tree; however, due to classpath issues with slf4j, this class must reside in
- * the {@code spring-test-mvc} source tree.
- * 
+ *
  * @author Sam Brannen
  * @since 3.2
  * @see Spr9799AnnotationConfigTests