Use range rather than xrange

Use range rather than xrange to improve python3
compatibiltiy.

Change-Id: I5a4434bbd2e5d509f84c3aa668eea8e46262816f
Signed-off-by: Chuck Short <chuck.short@canonical.com>
Use optparse for install_venv_common

In order to bootstrap a virtualenv from an unmodified 2.6 Python environment,
we need to use optparse instead of argparse or openstack.common.cfg.

Fixes bug 1174926

Change-Id: Iad636c7adf7b184756eeba5ca760d8a76fc0e354
Merge "Use optparse for install_venv_common"
Mark myself as a maintainer.

I've been cleaning up these three modules, so I may as well be
their maintainer as well. This was briefly discussed at the summit.

Change-Id: I3282eee857c89d3b91e5d3bdb42694c1497219a9
I'll maintain periodic_task as well.

I missed this one in the previous pass.

Change-Id: I6be4610859f1e716e7b77a850c4b3080d7a154ce