Change web context using Maven

<packaging>war</packaging>
<build>
<plugins>
  <plugin>
    <artifactId>maven-war-plugin</artifactId>
    <version>2.1.1</version>
    <configuration>
        <packagingExcludes>WEB-INF/web.xml</packagingExcludes>
        <warName>exp-elec-web</warName>
    </configuration>
</plugin>
</plugins>
</build>