Hardcoding version numbers means that they need to be updated for each
release. Instead let pbr set the version number everywhere.
Change-Id: I5037cf9d0e0adf0eed9cc3d18b36490cc2649e90
As per https://review.openstack.org/#/c/473230/, we need to change
the author in setup.cfg from Freezer Team to Openstack.
Change-Id: I885319f77edb36fe3de6d1864e81ba73bf12304f