LPS-47051 the sourcePrototypeLayout may not exist if it has been deleted from the site template.
LPS-46980 Revert "LPS-46191 SF"

This reverts commit 853a9cfa7ba9bd398c17fe18e6c0ff322372b52d.
LPS-46980 Revert "LPS-46191 Allow the portlet data handlers to work within an OSGi environment (xtream does some assumptions with the classloaders)"

This reverts commit 018dacde0f29142d429438c5a787ffc428ad98c8.