Fix cross python27 job for test-setup.sh
Fix cross python27 job for test-setup.sh

cross-python27 should do the same as python27 does - but it missed the
execution of the optional tools/test-setup.sh file. Add it.

Change-Id: Ie2fc16d52f1b6b944f3481f75ff0c59a666c80a4

openstack-infra/project-config,openstack-infra/project-config