This patch is follow up of change set of
4808f91eb2 bug/1260262 review/61694.
The change set adds unnecessary self.addCleanup(cfg.CONF.reset) to
VxlanTypeMultiRangeTest as pointed out. This patch Remove the line.
Change-Id: Ia6ce4bc346cf6320ba556e80689dadb7d84e5ee8