Add python-psycopg2 to ubuntu-precise; resolves travis-ci/apt-package-whitelist#1282
Add python-psycopg2 to ubuntu-precise; resolves travis-ci/apt-package-whitelist#1282

Packages: python-psycopg2 python-psycopg2-dbg python3-psycopg2 python3-psycopg2-dbg python-psycopg2-doc

travis-ci/apt-package-whitelist,travis-ci/apt-package-whitelist