[PATCH 3/5] Rework configurable 'PW_TEST_DB_xxx' settings

[Finucane, Stephen]

On 12 Nov 06:05, Stephen Finucane wrote:
> There are a number of environment variables that users can set to
> configure different aspects of their testing environment. Rework these
> like so:
> 
> * People use PostgreSQL, so make it as easy as possible for them to
>   develop and test against it. Add a 'PW_TEST_DB_TYPE' setting
> * Attempt to use defaults for the username and password in settings
> * Allow the user to configure the database name, if they so wish
> 
> Signed-off-by: Stephen Finucane <stephen.finucane at intel.com>

Merged.