Also remove SlideSorter::CreateController which only calls new;
fix a memory leak in osl_Security's MyTestPlugInImpl::initialize

Change-Id: I70b6e888984f8543adbf879162e752556d2b3f0e
Reviewed-on: https://gerrit.libreoffice.org/59805Reviewed-by: Noel Grandin <noel.grandin@collabora.co.uk>
Reviewed-by: Mike Kaganski <mike.kaganski@collabora.com>
Tested-by: Mike Kaganski <mike.kaganski@collabora.com>