These two fields allow to specify a different default assignee for ticket opened against this package in bugzilla. Note: The EPEL field is always displayed for packages in the 'rpms' namespace regardless of whether it is used in bugzilla or not.
7611173
Final 1.4.0 release Epoch bumped to make 1.4.0 win over 1.4.0.0, used by mistake in pre-release builds. Other option was to keep 1.4.0.0 in Version, like Debian: http://lists.openstack.org/pipermail/openstack-dev/2014-September/046425.html but we already had an Epoch so no big deal to bump it.