Fix _setUpExtension shim
Fix _setUpExtension shim

[1] recently converted _setUpExtension in [2] into a shim for a new
setup_extension method where an unused argument (resource_attribute_map)
is removed. In the process, a bug was introduced when calling the
new method by calling it with predefined values. This patch fixes it.

[1] Ia59fc1978228f9982d3ee447ebcfcb712eebbdb7
[2] neutron.tests.unit.extensions.base

Closes-Bug: #1769704

Change-Id: I39fb64d76809f49526e557e39cb07dfd9abdf9cb

openstack/neutron,noironetworks/neutron,openstack/neutron,huntxu/neutron,mahak/neutron,noironetworks/neutron,mahak/neutron,openstack/neutron,huntxu/neutron,mahak/neutron