storage: Use IsolatedTestAddr in TestGossipHandlesReplacedNode
storage: Use IsolatedTestAddr in TestGossipHandlesReplacedNode

paperstreet/cockroach,paperstreet/cockroach,paperstreet/cockroach,paperstreet/cockroach,paperstreet/cockroach,paperstreet/cockroach,paperstreet/cockroach,paperstreet/cockroach