Commands like glance md-namespace-show <namespace> fail because
of a breaking change in warlock 1.3.0's model creation factory
method.
Warlock introduced a new kwarg 'resolver' in model_factory method
but changed its position with the 'base_class' kwarg. Since we
were calling the model_factory method with positional arg, this
broke the model creation.
Closes-Bug: #1596573
Change-Id: Ic7821f4fdb1b752e0c7ed2bc486299a06bf485c1
Sabari Kumar Murugesan
d7db97c926