Update test cases for lava integration (SDK)

This commit applies the required changes to the test cases so
they can be executed in LAVA.

The change consists in adding the `git-repos` directive so they
can fetch the tests scripts from LAVA.

This is the SDK group in a serie of commits to integrate
all the tests into LAVA.

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