Variadic templates ~-i.e. templates, which can take an arbitrary
number of arguments of any type-~ is new C++11 feature

note that uno::Reference and cppu::UnoType can only take one parameter
thus leave XNamedObjectCollectionHelper non-variadic in vbacollectionimpl.hxx

Change-Id: I22e60fa050ee31d39ae8bb7cac06cf243c4587b1
Reviewed-on: https://gerrit.libreoffice.org/19145Reviewed-by: Michael Stahl <mstahl@redhat.com>
Tested-by: Michael Stahl <mstahl@redhat.com>