packaging: setup: database: cast port to str

old psycopg2 does not accept unicode string as port.

python-psycopg2-2.0.14-2.el6.x86_64

TypeError: port must be a string or int

*DO NOT* cast to int as usock will not work.

Bug-Url: https://bugzilla.redhat.com/show_bug.cgi?id=1067058
Change-Id: I51476e7a07ae6bf475415329873c96ddea638686
Signed-off-by: Alon Bar-Lev <alonbl@redhat.com>