Optimize releng cloning when running unit tests
Optimize releng cloning when running unit tests

not need to clone full releng
depth 1 is enough
do not go out of workspace anymore..never...

Change-Id: I1d2dbc30bec6c168ef7ddf3327cb00fff4056aa1
Signed-off-by: Morgan Richomme <863ecccd07b4194c40ddc432b982c8c67e56599a@orange.com>

mywulin/functest,opnfv/functest,mywulin/functest,opnfv/functest