Eradicate last of underscores in options

The --ip_range in stack.sh remains due to nova-manage needing to be fixed.

(Rebased 05Dec2013)

Change-Id: Ic0f93d41b6edfdc5deb82ae820e2c0c5a8bce24e
Merge "Eradicate last of underscores in options"
Merge branch 'master' of github.com:openstack-dev/devstack