And fix leak in BasicManagerImpl where it would never have freed
the streams.

Change-Id: I1e99c2c6a70a8cac27dd5c86a7042efc3de7a578
Reviewed-on: https://gerrit.libreoffice.org/26632Tested-by: Jenkins <ci@libreoffice.org>
Reviewed-by: Noel Grandin <noelgrandin@gmail.com>