[v3.2] Add grafana dashboard importing API (#11)

* Add API to import grafana templates to kubesphere dashboard
* Merge and fix the latest codes from kubesphere #2501

Signed-off-by: zhu733756 <talonzhu@yunify.com>

vendor/github.com/grafana-tools/sdk/rest-get_health.go

@@ -0,0 +1,50 @@
+package sdk
+
+/*
+   Copyright 2016 Alexander I.Grafov <grafov@gmail.com>
+   Copyright 2016-2019 The Grafana SDK authors
+
+   Licensed under the Apache License, Version 2.0 (the "License");
+   you may not use this file except in compliance with the License.
+   You may obtain a copy of the License at
+
+	   http://www.apache.org/licenses/LICENSE-2.0
+
+   Unless required by applicable law or agreed to in writing, software
+   distributed under the License is distributed on an "AS IS" BASIS,
+   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+   See the License for the specific language governing permissions and
+   limitations under the License.
+
+   ॐ तारे तुत्तारे तुरे स्व
+*/
+
+import (
+	"context"
+	"encoding/json"
+)
+
+// HealthResponse represents the health of grafana server
+type HealthResponse struct {
+	Commit   string `json:"commit"`
+	Database string `json:"database"`
+	Version  string `json:"version"`
+}
+
+// GetHealth retrieves the health of the grafana server
+// Reflects GET BaseURL API call.
+func (r *Client) GetHealth(ctx context.Context) (HealthResponse, error) {
+	var (
+		raw []byte
+		err error
+	)
+	if raw, _, err = r.get(ctx, "/api/health", nil); err != nil {
+		return HealthResponse{}, err
+	}
+
+	health := HealthResponse{}
+	if err := json.Unmarshal(raw, &health); err != nil {
+		return HealthResponse{}, err
+	}
+	return health, nil
+}