Calling Fatalf from a goroutine can trigger the race detector
Calling Fatalf from a goroutine can trigger the race detector

Sample output:
```
==================
WARNING: DATA RACE
Write by goroutine 61:
  testing.(*common).FailNow()
      /usr/local/go/src/testing/testing.go:328 +0x49
  testing.(*common).Fatalf()
      /usr/local/go/src/testing/testing.go:370 +0x97
  github.com/lytics/metafora/m_etcd.TestCoordinatorTC2()
      /home/schmichael/go/src/github.com/lytics/metafora/m_etcd/coordinator_test.go:121
+0xa1c
  testing.tRunner()
      /usr/local/go/src/testing/testing.go:447 +0x133

Previous write by goroutine 236:
  testing.(*common).FailNow()
      /usr/local/go/src/testing/testing.go:328 +0x49
  testing.(*common).Fatal()
      /usr/local/go/src/testing/testing.go:364 +0x83
  github.com/lytics/metafora/m_etcd.func·009()
      /home/schmichael/go/src/github.com/lytics/metafora/m_etcd/coordinator_test.go:102
+0x434

Goroutine 61 (running) created at:
  testing.RunTests()
      /usr/local/go/src/testing/testing.go:555 +0xd4e
  testing.(*M).Run()
      /usr/local/go/src/testing/testing.go:485 +0xe0
  main.main()
      github.com/lytics/metafora/m_etcd/_test/_testmain.go:88 +0x28c

Goroutine 236 (finished) created at:
  github.com/lytics/metafora/m_etcd.TestCoordinatorTC2()
      /home/schmichael/go/src/github.com/lytics/metafora/m_etcd/coordinator_test.go:108
+0x6d7
  testing.tRunner()
      /usr/local/go/src/testing/testing.go:447 +0x133
==================
```

schmichael/metafora,lytics/metafora,schmichael/metafora,lytics/metafora