Revert "Revert "Add spectool call in build_rpm.sh""
Revert "Revert "Add spectool call in build_rpm.sh""

We now have the patches merged, and we can also test it in the
gate.

This reverts commit 951872f36fcda7e8e184ee803c2fb9a1e164305b.

Change-Id: If1d7d12d3e513d223d130cc89ffd756735b1e1b6

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