Allow go template to work properly with inspect

Closes #11641

Signed-off-by: Srini Brahmaroutu <srbrahma@us.ibm.com>

integration-cli/docker_cli_exec_test.go

@@ -448,7 +448,7 @@ func (s *DockerSuite) TestInspectExecID(c *check.C) {
 	if err != nil {
 		c.Fatalf("failed to inspect container: %s, %v", out, err)
 	}
-	if out != "<no value>" {
+	if out != "[]" {
 		c.Fatalf("ExecIDs should be empty, got: %s", out)
 	}