Replace @XXXX@ tokens in JBDS About dialog with actual build information.

In old build it is done in jbds builder as

<replace file="${buildDirectory}/plugins/com.jboss.jbds.product/about.mappings">
<replacefilter
token="@product.releaseNumber@"
value="${product.releaseNumber}"/>
<replacefilter
token="@product.buildQualifier@"
value="${product.buildQualifier}"/>
<replacefilter
token="@product.buildTimeStamp@"
value="${product.buildTimeStamp}"/>
</replace>