Remove unnecessary resource_setup in DvrRoutersNegativeTest

In DvrRoutersNegativeTest's resource_setup, a router, a network,
and a subnet are created which is of no use. This is to remove
the unnecessary resource_setup to make the testcase faster and to
keep the code clean.

Change-Id: I146a7f4198b7fea53608e8e5cc51918fbeb8e3e5
1 file changed