NamespaceImpl.clearContains()

The class org.netbeans.jmiimpl.mof.model.NamespaceImpl has a static 
HashMap member named contains.  This causes problems when a repository 
is loaded, shut down, and then reloaded, because the original Storage 
object is still lingering in this map after it has already been shut 
down.  The next attempt to use it (e.g. parsing an XMI file) causes 
weird symptoms (invalid file handle in the btree case; connection 
already closed in the JDBC case).

I have added a public static member clearContains() to address this. 
Currently I'm calling it explicitly from my application's code to solve 
the reload problem.  Could someone who knows better figure out where the 
right place is to call this automatically?

Thanks,
JVS