Require requirements for legacy-bandit-integration
Require requirements for legacy-bandit-integration

The legacy-bandit-integration-.* jobs are tox-based and many (if not
all) run on projects which attempt to zuul-clone requirements for
its upper-constraints.txt file. Add openstack/requirements to the
required-projects list for all of these jobs.

Change-Id: I15f092ef2fbe1a64a5782ce78ab10876a96c3b47

openstack-infra/openstack-zuul-jobs,openstack-infra/openstack-zuul-jobs