Godeps: update go-dockerclient
Godeps: update go-dockerclient

Should fix the race build. Data race detected in the build:

==================
WARNING: DATA RACE
Write by goroutine 715:
  github.com/fsouza/go-dockerclient/testing.(*DockerServer).createContainer()
      /tmp/gopath/tsuru/src/github.com/fsouza/go-dockerclient/testing/server.go:428 +0x11a6
  github.com/fsouza/go-dockerclient/testing.(*DockerServer).(github.com/fsouza/go-dockerclient/testing.createContainer)-fm()
      /tmp/gopath/tsuru/src/github.com/fsouza/go-dockerclient/testing/server.go:102 +0x4b
  github.com/fsouza/go-dockerclient/testing.(*DockerServer).handlerWrapper.func1()
      /tmp/gopath/tsuru/src/github.com/fsouza/go-dockerclient/testing/server.go:286 +0x4d9
  net/http.HandlerFunc.ServeHTTP()
      /tmp/workdir/go/src/net/http/server.go:1422 +0x47
  github.com/fsouza/go-dockerclient/external/github.com/gorilla/mux.(*Router).ServeHTTP()
      /tmp/gopath/tsuru/src/github.com/fsouza/go-dockerclient/external/github.com/gorilla/mux/mux.go:100 +0x37f
  github.com/fsouza/go-dockerclient/testing.(*DockerServer).ServeHTTP()
      /tmp/gopath/tsuru/src/github.com/fsouza/go-dockerclient/testing/server.go:247 +0x2ad
  net/http.serverHandler.ServeHTTP()
      /tmp/workdir/go/src/net/http/server.go:1862 +0x206
  net/http.(*conn).serve()
      /tmp/workdir/go/src/net/http/server.go:1361 +0x117c

Previous read by goroutine 373:
  github.com/fsouza/go-dockerclient/testing.(*DockerServer).removeContainer()
      /tmp/gopath/tsuru/src/github.com/fsouza/go-dockerclient/testing/server.go:673 +0x21a
  github.com/fsouza/go-dockerclient/testing.(*DockerServer).(github.com/fsouza/go-dockerclient/testing.removeContainer)-fm()
      /tmp/gopath/tsuru/src/github.com/fsouza/go-dockerclient/testing/server.go:113 +0x4b
  github.com/fsouza/go-dockerclient/testing.(*DockerServer).handlerWrapper.func1()
      /tmp/gopath/tsuru/src/github.com/fsouza/go-dockerclient/testing/server.go:286 +0x4d9
  net/http.HandlerFunc.ServeHTTP()
      /tmp/workdir/go/src/net/http/server.go:1422 +0x47
  github.com/fsouza/go-dockerclient/external/github.com/gorilla/mux.(*Router).ServeHTTP()
      /tmp/gopath/tsuru/src/github.com/fsouza/go-dockerclient/external/github.com/gorilla/mux/mux.go:100 +0x37f
  github.com/fsouza/go-dockerclient/testing.(*DockerServer).ServeHTTP()
      /tmp/gopath/tsuru/src/github.com/fsouza/go-dockerclient/testing/server.go:247 +0x2ad
  net/http.serverHandler.ServeHTTP()
      /tmp/workdir/go/src/net/http/server.go:1862 +0x206
  net/http.(*conn).serve()
      /tmp/workdir/go/src/net/http/server.go:1361 +0x117c

Goroutine 715 (running) created at:
  net/http.(*Server).Serve()
      /tmp/workdir/go/src/net/http/server.go:1910 +0x464
  net/http.Serve()
      /tmp/workdir/go/src/net/http/server.go:1765 +0xc5

Goroutine 373 (running) created at:
  net/http.(*Server).Serve()
      /tmp/workdir/go/src/net/http/server.go:1910 +0x464
  net/http.Serve()
      /tmp/workdir/go/src/net/http/server.go:1765 +0xc5
==================

ArxdSilva/tsuru,ggarnier/tsuru,ggarnier/tsuru,tsuru/tsuru,tsuru/tsuru,Endika/tsuru,cezarsa/tsuru,guilhermebr/tsuru,Endika/tsuru,ArxdSilva/tsuru,Endika/tsuru,guilhermebr/tsuru,ggarnier/tsuru,ggarnier/tsuru,cezarsa/tsuru,ArxdSilva/tsuru,cezarsa/tsuru,guilhermebr/tsuru,gwmoura/tsuru,guilhermebr/tsuru,tsuru/tsuru,ArxdSilva/tsuru,gwmoura/tsuru,tsuru/tsuru,gwmoura/tsuru,cezarsa/tsuru