Update test cases for lava integration (group 0)

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 group 0 in a serie of commits to integrate all the
tests into LAVA.

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