educate maven-release-plugin to know abuot grails versioning

morepom.xml

<plugin>
    <groupId>org.apache.maven.plugins</groupId>
    <artifactId>maven-release-plugin</artifactId>
    <version>2.2.1</version>

    <configuration>
        <autoVersionSubmodules>true</autoVersionSubmodules>
        <preparationGoals>grails:set-version scm:checkin clean install</preparationGoals>
        <completionGoals>grails:set-version scm:checkin</completionGoals>
        <goals>scm:checkin</goals>
        <arguments>-Dbasedir=. -Dincludes=application.properties -Dmessage="adding grails properties to release"</arguments>
    </configuration>
</plugin>
<plugin>
    <groupId>org.apache.maven.plugins</groupId>
    <artifactId>maven-scm-plugin</artifactId>
    <version>1.6</version>
</plugin>