Suppress UserWarning from psycopg2

[robzor92]

In colab we get this error: /usr/local/lib/python3.7/dist-packages/psycopg2/init.py:144: UserWarning: The psycopg2 wheel package will be renamed from release 2.8; in order to keep installing from binary please use "pip install psycopg2-binary" instead. For details see: http://initd.org/psycopg/docs/install.html#binary-install-from-pypi.
""") We should suppress it.