adding src/main/resources so xml can be side-by-side with the code in samples

spring-integration-samples/pom.xml

@@ -94,6 +94,14 @@
 		<!--  -->
 	</dependencies>
 	<build>
+		<resources>
+			<resource>
+				<directory>src/main/java</directory>
+				<includes>
+					<include>**/*.xml</include>
+				</includes>
+			</resource>
+		</resources>
 		<plugins>
 			<plugin>
 				<groupId>org.apache.maven.plugins</groupId>