use newer psycopg2 from pip instead of stale ubuntu python-psycopg
use newer psycopg2 from pip instead of stale ubuntu python-psycopg

The lack of JSON adaptation in the psycopg2 driver is causing CI builds
to fail. Try to change the test host config to have a newer driver.

ini-bdds/ermrest,ini-bdds/ermrest,informatics-isi-edu/ermrest,informatics-isi-edu/ermrest