Revert "Add local workspace remove prefix configuration"

This reverts commit 1689bbb114fbf1b9d972a5160c0efd9fa1d53c5c.
Add local workspace remove prefix configuration

Currently by default the capabilities document produced from virtual workspaces will remove the namespace prefix from the layer names.  This commit adds a configuraton option to disable this behaviour.  This is also a fix for http://jira.codehaus.org/browse/GEOS-5476