Drop python26 jobs from oslo projects
Drop python26 jobs from oslo projects

Signal that we won't be worrying about py26 compatability
any more from now on.
https://etherpad.openstack.org/p/mitaka-oslo-library-updates

Change-Id: I756df0804c9287306e9fb2e41daefee6bdd3ceb3

openstack-infra/project-config,Tesora/tesora-project-config,Tesora/tesora-project-config,noorul/os-project-config,dongwenjuan/project-config,noorul/os-project-config,openstack-infra/project-config,dongwenjuan/project-config