UPDATE: fixed driver unloading via DB-specific code

git-svn-id: https://svn.javlin.eu/svn/cloveretl.opensource/trunk-3-5@16399 a09ad3ba-1a0f-0410-b1b9-c67202f10d70
UPDATE: attempt to fix "Illegal class loader binding"

git-svn-id: https://svn.javlin.eu/svn/cloveretl.opensource/trunk-3-5@16404 a09ad3ba-1a0f-0410-b1b9-c67202f10d70