Fix for #340.

[Zegveld]

#340 issue in short: property versions are overwritten with actual versions instead of leaving them alone.

Also ran into this problem, fixed it by adding an ignore for versions that start with the '${' property reference announcer.

Added it everywhere I also saw the following bit of code that skipped the reactor dependencies:

            if ( isExcludeReactor() && isProducedByReactor( dep ) )
            {
                getLog().info( "Ignoring reactor dependency: " + toString( dep ) );
                continue;
            }

see also #340

[khmarbaise]

Thanks for your contribution.