Fixes bug when trying to delete the current connected database

When you connect you need to specify a database, since we are dropping the database we can't connect to the same database, so we use template1 to connect and run the commands.

django_extensions/management/commands/reset_db.py

@@ -108,7 +108,7 @@ def handle(self, *args, **options):
  elif engine in ('postgresql_psycopg2', 'postgis'):
  import psycopg2 as Database # NOQA
 
- conn_string = "dbname=%s" % database_name
+ conn_string = "dbname=template1"
  if user:
  conn_string += " user=%s" % user
  if password: