Declare support for Python versions in setup.cfg

Change-Id: Iffdcf7a6eab6990f9b32669070b8a4173e834613
Remove copyright from empty files

According to policy change in HACKING:
http://docs.openstack.org/developer/hacking/#openstack-licensing
empty files should no longer contain copyright notices.

Closes-Bug: #1262424
Change-Id: Ib937beb9f627e7b5e25baa1cd37fd01fcc04fd41
Merge "Declare support for Python versions in setup.cfg"
Init sphinx config values before accessing them.

Sphinx's config object needs to have its values initialized with
init_values for the values to be loaded from _raw_config into config.
Without this pbr gets null equivalent values from Sphinx's config. These
null values prevented man pages from being built when Sphinx warnerrors
is set. Fix this.

Change-Id: I0f17ca6eff036a0bcc6686fcc3f4efe0830cc585