Docs update for mysql and postgresl: Mentioned test/db_test_base.py because

  that is the place where the default database parameters comes from.

Author: Bernhard Reiter

doc/mysql.txt

@@ -37,8 +37,8 @@ this:
        FLUSH PRIVILEGES;
 
 2. If your administrator has provided you with database connection info, 
-   you can modify MYSQL_* constants in the file test/test_db.py with 
-   the correct values.
+   see the config values in 'test/db_test_base.py' 
+   about which database connection, name and user will be used.
 
 The MySQL database should not contain any tables. Tests will not 
 drop the database with existing data.

doc/postgresql.txt

@@ -25,10 +25,8 @@ Running the PostgreSQL unit tests
 
 The user that you're running the tests as will need to be able to access
 the postgresql database on the local machine and create and drop
-databases. Edit the ``test/test_postgresql.py`` database connection info if
-you wish to test against a different database.
-
-The test database will be called "rounduptest".
+databases. See the config values in 'test/db_test_base.py' 
+about which database connection, name and user will be used.
 
 
 Credit