DUBBO-149 <dubbo:protocol未配name时，生成的缺省id也应为dubbo，便于-D参数覆盖

git-svn-id: http://code.alibabatech.com/svn/dubbo/trunk@697 1a56cb94-b969-4eaa-88fa-be21384802f2

dubbo-config/src/main/java/com/alibaba/dubbo/config/spring/schema/DubboBeanDefinitionParser.java

@@ -74,8 +74,12 @@ public class DubboBeanDefinitionParser implements BeanDefinitionParser {
         String id = element.getAttribute("id");
         if ((id == null || id.length() == 0) && required) {
         	String generatedBeanName = element.getAttribute("name");
-        	if (generatedBeanName == null || generatedBeanName.length() == 0) {
-        		generatedBeanName = element.getAttribute("interface");
+        	if (generatedBeanName == null || generatedBeanName.length() == 0) {
+        	    if (ProtocolConfig.class.equals(beanClass)) {
+        	        generatedBeanName = "dubbo";
+        	    } else {
+        	        generatedBeanName = element.getAttribute("interface");
+        	    }
         	}
         	if (generatedBeanName == null || generatedBeanName.length() == 0) {
         		generatedBeanName = beanClass.getName();