use two-space indentation in template block
move keystone authtoken configuration to cinder.conf

Also removes the api-paste.ini template. Since it's all static, we can
just rely on the vanilla one from upstream.
user/password are already handled by keystone_settings

the new KeystoneHelper should take care of retrieving
service_user/service_password so we don't have to do that here anymore
Moved helper into barclamp namespace
Merge pull request #181 from tboerger/feature/helper-rename

Moved helper into barclamp namespace
Merge pull request #176 from mapleoin/keystone_settings

user/password are already handled by keystone_settings
Merge pull request #177 from mapleoin/authtoken

move keystone authtoken configuration to cinder.conf