解决method的配置executes参数的xsd验证错误

Author: JoeCao

dubbo-config/dubbo-config-spring/src/main/resources/META-INF/dubbo.xsd

@@ -589,6 +589,11 @@
 						<xsd:documentation><![CDATA[ The method name (method.toString()). ]]></xsd:documentation>
 					</xsd:annotation>
 				</xsd:attribute>
+				<xsd:attribute name="executes" type="xsd:string" use="optional">
+					<xsd:annotation>
+						<xsd:documentation><![CDATA[ The max active requests. ]]></xsd:documentation>
+					</xsd:annotation>
+				</xsd:attribute>
 				<xsd:attribute name="stat" type="xsd:string" use="optional" default="-1">
 					<xsd:annotation>
 						<xsd:documentation><![CDATA[ The method parameter index for statistics. ]]></xsd:documentation>