[maven-release-plugin] prepare release v0.4.0

Author: rabbitmq-ci

pom.xml

@@ -2,7 +2,7 @@
     <modelVersion>4.0.0</modelVersion>
     <groupId>com.rabbitmq.client</groupId>
     <artifactId>amqp-client</artifactId>
-    <version>0.4.0-SNAPSHOT</version>
+    <version>0.4.0</version>
     <name>RabbitMQ AMQP 1.0 Java client</name>
     <description>The RabbitMQ AMQP 1.0 Java client library defines an API to access RabbitMQ
         with AMQP 1.0.
@@ -35,7 +35,7 @@
         <url>https://github.com/rabbitmq/rabbitmq-amqp-java-client</url>
         <connection>scm:git:git://github.com/rabbitmq/rabbitmq-amqp-java-client.git</connection>
         <developerConnection>scm:git:https://github.com/rabbitmq/rabbitmq-amqp-java-client.git</developerConnection>
-        <tag>HEAD</tag>
+        <tag>v0.4.0</tag>
     </scm>
 
     <properties>