Samples cleanup

- Move common properties to samples parent
 - Avoid explicit `ComponentScan` by moving all the classes to the same package

spring-cloud-stream-samples/source/src/main/java/demo/DateFormat.java

@@ -14,7 +14,7 @@
  * limitations under the License.
  */
 
-package source;
+package demo;
 
 import static java.lang.annotation.ElementType.*;
 import static java.lang.annotation.RetentionPolicy.*;

spring-cloud-stream-samples/source/src/main/java/demo/SourceApplication.java

@@ -18,12 +18,8 @@ package demo;
 
 import org.springframework.boot.SpringApplication;
 import org.springframework.boot.autoconfigure.SpringBootApplication;
-import org.springframework.context.annotation.ComponentScan;
-
-import source.TimeSource;
 
 @SpringBootApplication
-@ComponentScan(basePackageClasses=TimeSource.class)
 public class SourceApplication {
 
 	public static void main(String[] args) {

spring-cloud-stream-samples/source/src/main/java/demo/TimeSource.java

@@ -14,7 +14,10 @@
  * limitations under the License.
  */
 
-package source;
+package demo;
+
+import java.text.SimpleDateFormat;
+import java.util.Date;
 
 import org.springframework.beans.factory.annotation.Autowired;
 import org.springframework.boot.context.properties.EnableConfigurationProperties;
@@ -26,9 +29,6 @@ import org.springframework.integration.annotation.Poller;
 import org.springframework.integration.core.MessageSource;
 import org.springframework.messaging.support.GenericMessage;
 
-import java.text.SimpleDateFormat;
-import java.util.Date;
-
 /**
  * @author Dave Syer
  * @author Glenn Renfro

spring-cloud-stream-samples/source/src/main/java/demo/TimeSourceOptionsMetadata.java

@@ -14,7 +14,7 @@
  * limitations under the License.
  */
 
-package source;
+package demo;
 
 import javax.validation.constraints.Min;
 import javax.validation.constraints.Pattern;