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.

Change-Id: Iba09a00f24dfbd1cd03c1c9f70ea216788e64d93
Closes-Bug: #1262424
Remove remaining print statements

I think these are the last two stragglers, including debugging lines

Change-Id: Ic3dd98480211d0f7d3cc951bec5cd54f902a101f
Merge "Remove remaining print statements"
Fix keyring issue where there were name space problems

The import of keyring conflicted with a string named keyring

Change-Id: I7416ea1cf453a126dd03dba8bc2900cad35ed2da
Closes-bug: #1271987
Merge "Remove copyright from empty files"
Merge "Fix keyring issue where there were name space problems"
Merge "Add token create subcommand for identity v2 api"

Change-Id: I136ac782bb8716183a2c4c6ba8c28e6c2ecc7e2c
Merge branch 'master' of https://github.com/openstack/python-openstackclient