ports/178054: databases/py-firebirdsql: update to 0.7.3

[edwin at FreeBSD.org]

Synopsis: databases/py-firebirdsql: update to 0.7.3

Responsible-Changed-From-To: freebsd-ports-bugs->freebsd-python
Responsible-Changed-By: edwin
Responsible-Changed-When: Mon Apr 22 15:00:10 UTC 2013
Responsible-Changed-Why: 
freebsd-python@ wants this port PRs (via the GNATS Auto Assign Tool)

http://www.freebsd.org/cgi/query-pr.cgi?pr=178054