gossip unit test failing intermittently

[bboreham]

For example https://travis-ci.org/weaveworks/weave/builds/66049086:

--- FAIL: TestGossipTopology-2 (0.00s)
    util.go:134: Expected connections not found: from 02:00:00:02:00:00 to map[03:00:00:03:00:00:{}]
...
    github.com/weaveworks/weave/router.implTestGossipTopology(0xc2091082d0)
        /home/travis/gopath/src/github.com/weaveworks/weave/router/gossip_test.go:116 +0xc0b

Appears to be caused by topology updates being delivered on a different goroutine, which sometimes happens later than expected. There is a 'FIXME' comment to the effect that sendPendingGossip() may not work.

go test -race reports many race conditions in this test, which may or may not be relevant.

[rade]

This still seems to be happening