Remove Job from Info API

Two main things
- Create a real struct Info for all of the data with the proper types
- Add test for REST API get info

Signed-off-by: Hu Keping <hukeping@huawei.com>

integration-cli/docker_api_info_test.go

@@ -0,0 +1,38 @@
+package main
+
+import (
+	"net/http"
+	"strings"
+	"testing"
+)
+
+func TestInfoApi(t *testing.T) {
+	endpoint := "/info"
+
+	statusCode, body, err := sockRequest("GET", endpoint, nil)
+	if err != nil || statusCode != http.StatusOK {
+		t.Fatalf("Expected %d from info request, got %d", http.StatusOK, statusCode)
+	}
+
+	// always shown fields
+	stringsToCheck := []string{
+		"ID",
+		"Containers",
+		"Images",
+		"ExecutionDriver",
+		"LoggingDriver",
+		"OperatingSystem",
+		"NCPU",
+		"MemTotal",
+		"KernelVersion",
+		"Driver"}
+
+	out := string(body)
+	for _, linePrefix := range stringsToCheck {
+		if !strings.Contains(out, linePrefix) {
+			t.Errorf("couldn't find string %v in output", linePrefix)
+		}
+	}
+
+	logDone("container REST API - check GET /info")
+}