DependencySet's include processing should error out when the include dependency is not available

<dependencySets>
<dependencySet>
<includes>
<include>some-groupId:some-artifactId</include>
</includes>
</dependencySet>

I have a descriptor that use lots of include statements. assembly plugin should error out when the specified dependency is not in the dependency list.
This will help to catch the error at packaging time rather eye balling the zip file.