chore(requirements): update psycopg

http://initd.org/psycopg/articles/2016/07/07/psycopg-262-released/

Author: helgi

rootfs/requirements.txt

@@ -9,7 +9,7 @@ gunicorn==19.6.0
 jsonfield==1.0.3
 morph==0.1.2
 ndg-httpsclient==0.4.1
-psycopg2==2.6.1
+psycopg2==2.6.2
 pyOpenSSL==16.0.0
 pytz==2016.4
 ruamel.yaml==0.11.11