Update the tox configuration to pull in the openstack
upper-constraints.txt when running releasenotes. This will
fix the releasenotes job that is currently failing due to
a new version of sphinx. Additionally this change includes
updates from puppet-modulesync-configs.
Bindep is an automation tool used by openstack-infra to bootstrap a
worker with default packages. This is not needed, since we depend on
puppet to automate this step.