[Twisted-Python] Database tests and Buildbots

[Jonathan Lange]

Hello,

I'm trying to reproduce #1630 using the buildbots and I'm not having
any luck.  Apparently none of the database software is installed on
any of the buildbots.  All the tests are skipped with 'Cannot access
db'.

Can the buildbot maintainers please configure their slaves to have the
appropriate software installed. Otherwise, we can't really continue
supporting twisted.enterprise.

cheers,
jml