[SPR-7960][SPR-8386] Supporting declarative configuration of bean definition profiles in the TestContext framework:

- TextContext now works with MergedContextConfiguration instead of locations and loader
- TextContext now builds context caching key from MergedContextConfiguration
- Test context caching is now based on locations, classes, active profiles, and context loader
- TextContext now delegates to SmartContextLoader or ContextLoader as appropriate
- AbstractContextLoader now implements SmartContextLoader
- AbstractGenericContextLoader now sets active profiles in the GenericApplicationContext 
- Introduced integration tests for profile support in the TCF for both XML and annotation config

org.springframework.test/src/test/resources/log4j.xml

@@ -15,8 +15,14 @@
 		<level value="warn" />
 	</logger>
 
-	<logger name="org.springframework.binding">
-		<level value="debug" />
+	<logger name="org.springframework.test.context.TestContext">
+		<level value="warn" />
+	</logger>
+	<logger name="org.springframework.test.context.ContextLoaderUtils">
+		<level value="warn" />
+	</logger>
+	<logger name="org.springframework.test.context.support.AbstractGenericContextLoader">
+		<level value="warn" />
 	</logger>
 
 	<!-- Root Logger -->
@@ -24,5 +30,5 @@
 		<priority value="warn" />
 		<appender-ref ref="console" />
 	</root>
-	
+
 </log4j:configuration>