Update workaround for pbr >= 0.11
Update workaround for pbr >= 0.11

There are some changes in the requirements.txt files that do not
match the regexp used in the previous patch, for example
https://github.com/openstack/nova/blob/master/test-requirements.txt#L11

Adding another substitution, required by
https://github.com/openstack/neutron/blob/master/requirements.txt#L42-L43

Change-Id: I853103a72a711f40a8c2e87224486d99165c6906

openstack-packages/delorean,openstack-packages/DLRN,openstack-packages/delorean,openstack-packages/DLRN