The ACR Plugin is capable of filtering the deployment descriptor (/META-INF/application-client.xml) for you, if you have the need to inject values into it during the build.
To filter the deployment descriptor add the following configuration to your POM:
<project> ... <build> <plugins> <plugin> <groupId>org.apache.maven.plugins</groupId> <artifactId>maven-acr-plugin</artifactId> <version>1.1</version> <configuration> <filterDeploymentDescriptor>true</filterDeploymentDescriptor> </configuration> </plugin> </plugins> </build> ... </project>