tests fail with Go 1.4

[Michael Hudson-Doyle]

Specifically these two:

--- FAIL: TestGoroutinesRunning (0.00s)
 z_last_test.go:57: num goroutines = 1
 z_last_test.go:59: Too many goroutines.
 z_last_test.go:61: 1 instances of:
  testing.RunTests(0x8587b8, 0x971200, 0x6d, 0x6d, 0x975501)
   /home/mwhudson/go1.4/src/testing/testing.go:556 +0xad6
  testing.(*M).Run(0xc2080460f0, 0x97c900)
   /home/mwhudson/go1.4/src/testing/testing.go:485 +0x6c
  main.main()
   launchpad.net/ubuntu-push/http13client/_test/_testmain.go:282 +0x1d5
FAIL
FAIL launchpad.net/ubuntu-push/http13client 22.001s

panic: time: Stop called on uninitialized Timer

goroutine 73 [running]:
time.(*Timer).Stop(0xc2080949c0, 0xc2080a2380)
 /home/mwhudson/go1.4/src/time/sleep.go:59 +0x74
launchpad.net/ubuntu-push/launch_helper.func·006(0xc20804dae0)
 /opt/opensource/gopath/src/launchpad.net/ubuntu-push/launch_helper/kindpool.go:284 +0x3e
launchpad.net/ubuntu-push/launch_helper.(*kindHelperPool).peekId(0xc20807c180, 0x70d350, 0x3, 0xc2080177a8, 0x0)
 /opt/opensource/gopath/src/launchpad.net/ubuntu-push/launch_helper/kindpool.go:276 +0xd5
launchpad.net/ubuntu-push/launch_helper.(*kindHelperPool).OneDone(0xc20807c180, 0x70d350, 0x3)
 /opt/opensource/gopath/src/launchpad.net/ubuntu-push/launch_helper/kindpool.go:287 +0x7f
created by launchpad.net/ubuntu-push/launch_helper.(*poolSuite).TestOneDoneOnBadFileOut
 /opt/opensource/gopath/src/launchpad.net/ubuntu-push/launch_helper/kindpool_test.go:317 +0x2a7

[...]
FAIL launchpad.net/ubuntu-push/launch_helper 0.440s

[Michael Hudson-Doyle (mwhudson)]

FWIW, wily has Go 1.4 currently so this means that ubuntu-push ftbfs currently...