This patch makes "network list" command use sdk.
Since we have to keep the other commands runnable with
the old network client, we use a temporary method to
create sdk network client. And as a result, the tests
need to patch a method to fake the temporary method,
which will be removed at last.
Change-Id: I0882501cd7bb2c17917e10a6da4298f1452c9765
Implements: blueprint neutron-client
Co-Authored-By: Terry Howe <terrylhowe@gmail.com>
Co-Authored-By: Tang Chen <tangchen@cn.fujitsu.com>
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