Cleanup postgresql-server on openSUSE

During database cleanup, delete postgresql-server package also on
openSUSE.

Change-Id: I4dff0ac6493ab9b9a8c6ed15b7cfcdb35264da27
Stud is available in new distributions

Stud was marked as precise-only. In reality it's only not available in
lucid. All supported distributions are ok now.

partial blueprint devstack-https
Change-Id: Ie86f345102cfddcca5387be514b67641ef750313
Merge "Cleanup postgresql-server on openSUSE"
Merge "Stud is available in new distributions"