-

On the PE 2.3.9 front:
    puppetdb-termini-2.3.9-1.el7.centos.noarch.rpm --> dummy package in 2.3 world
    provides
        puppetdb-termini = 2.3.9-1.el7.centos
        puppetdb-terminus = 2.3.9
    requires
        puppetdb-terminus >= 2.3.8
        puppetdb-terminus <= 3

    puppetdb-terminus-2.3.9-1.el7.centos.noarch.rpm --> actual payload
    provides
        puppetdb-terminus = 2.3.9
        puppetdb-terminus = 2.3.9-1.el7.centos
    requires
        puppetdb-termini = 2.3.9



In Puppet 4 (normal packages)
puppetdb-4.0.0-0.1SNAPSHOT.2016.02.24T1147.el7.noarch.rpm
puppetdb-termini-4.0.0-0.1SNAPSHOT.2016.02.24T1147.el7.noarch.rpm
New package
 puppetdb-terminus-4.0.0-1.el7.centos.noarch.rpm
   requires
     puppetdb-termini >= 4


     I think we might be able to just add provides puppetdb-terminus-4 to the 4 termini package