Post migration assertion fixes

Signed-off-by: Daniel Nephin <dnephin@docker.com>
Upstream-commit: c9e52bd0da0461e605a3678b85702f83081504a7
Component: engine

components/engine/integration-cli/cli/cli.go

@@ -8,6 +8,7 @@ import (
 
 	"github.com/docker/docker/integration-cli/daemon"
 	"github.com/docker/docker/integration-cli/environment"
+	"github.com/gotestyourself/gotestyourself/assert"
 	"github.com/gotestyourself/gotestyourself/icmd"
 	"github.com/pkg/errors"
 )
@@ -24,6 +25,7 @@ func SetTestEnvironment(env *environment.Execution) {
 type CmdOperator func(*icmd.Cmd) func()
 
 type testingT interface {
+	assert.TestingT
 	Fatal(args ...interface{})
 	Fatalf(string, ...interface{})
 }