Merge pull request #1493 from chuntaojun/support_old_version

Fix @NacosConfigurationProperties to support old version

api/src/main/java/com/alibaba/nacos/api/config/annotation/NacosConfigurationProperties.java

@@ -57,6 +57,15 @@ public @interface NacosConfigurationProperties {
      */
     String dataId();
 
+    /**
+     * set config type is yaml
+     * this method is deprecated, we support you use {@link #type()} to set config type
+     *
+     * @return default value <code>false</code>
+     */
+    @Deprecated
+    boolean yaml() default false;
+
     /**
      * config style
      *