Useful for upgrade etc., which is preferablly done serially.
Example usage: tools/kolla-ansible deploy OR tools/kolla-ansible upgrade
Closes-Bug: #1576708
DocImpact
Change-Id: I34b2e16f8ce53e472a4682a4738c4ac0f5abf00c
There should be a blank line between 'transport_url' and 'use_neutron = True',
otherwise these line will be merge into one line after rendering.
TrivialFix
Change-Id: I66d14d5bc4b03b450cdcc0f7ac80548ed90bcd2d