Declare PostgreSql in dsn stuff

Change-Id: I72343bff0d5e6a65a45fc47cc1d346155330f1e5
Reviewed-on: https://gerrit.libreoffice.org/19310Tested-by: Jenkins <ci@libreoffice.org>
Reviewed-by: Lionel Elie Mamane <lionel@mamane.lu>
(cherry picked from commit 898aff0d)
Reviewed-on: https://gerrit.libreoffice.org/19315Reviewed-by: Tomaž Vajngerl <quikee@gmail.com>
(cherry picked from commit 6b847910)