Fix specifying db passwd in cloud-install-sys-tmplt

Signed-off-by: Hugo Trippaers <htrippaers@schubergphilis.com>
Fix test naming to reflect the test purpose

Signed-off-by: Prasanna Santhanam <tsp@apache.org>
(cherry picked from commit 445341355d18d280c745e8a1abcf39bafd938f91)