Add psdk-test

The psdk-test is a script to semi-automate the following SDK persistent tests:

https://qa.apertis.org/sdk-persistent-disk.html https://qa.apertis.org/sdk-persistent-disk-home-user.html https://qa.apertis.org/sdk-persistent-disk-etc.html

The script executes a prompt to enter a set of commands that will automatically run most of the test setup and execution guiding the tester through the different stages of the test.

Signed-off-by: Luis Araujo luis.araujo@collabora.co.uk