INT-1647 fixed core schema to work with alternative XML parsers (continued)

spring-integration-core/src/main/resources/org/springframework/integration/config/xml/spring-integration-2.0.xsd

@@ -680,7 +680,7 @@
 		</xsd:annotation>
 		<xsd:complexType>
 			<xsd:sequence>
-				<xsd:choice>
+				<xsd:choice minOccurs="0" maxOccurs="1" >
 					<xsd:sequence> 
 						<xsd:element name="poller" type="basePollerType" /> 
 						<xsd:element ref="beans:bean" minOccurs="0" maxOccurs="1" /> 

spring-integration-core/src/test/java/org/springframework/integration/config/xml/InboundChannelAdapterWithDefaultPollerTests.java

@@ -42,7 +42,7 @@ public class InboundChannelAdapterWithDefaultPollerTests {
 	private SourcePollingChannelAdapter adapter;
 
 
-	@Test @Ignore
+	@Test 
 	public void verifyDefaultPollerInUse() {
 		Trigger trigger = TestUtils.getPropertyValue(adapter, "trigger", Trigger.class);
 		assertEquals(PeriodicTrigger.class, trigger.getClass());