chore(controller): update psycopg to 2.5.4

http://pythonhosted.org//psycopg2/news.html#what-s-new-in-psycopg-2-5-4
http://pythonhosted.org//psycopg2/news.html#what-s-new-in-psycopg-2-5-3
Merge pull request #2141 from mboersma/update-psycopg

chore(controller): update psycopg to 2.5.4