prepare for 2.6.11 release

Author: chickenlj

all/pom.xml

@@ -19,11 +19,11 @@
     <parent>
         <groupId>com.alibaba</groupId>
         <artifactId>dubbo-parent</artifactId>
-        <version>2.6.11-SNAPSHOT</version>
+        <version>2.6.11</version>
         <relativePath>../pom.xml</relativePath>
     </parent>
     <artifactId>dubbo</artifactId>
-    <version>2.6.11-SNAPSHOT</version>
+    <version>2.6.11</version>
     <packaging>jar</packaging>
     <name>dubbo-all</name>
     <description>The all in one project of dubbo</description>