Add vendor folder to git

vendor/github.com/grpc-ecosystem/grpc-gateway/examples/examplepb/echo_service.swagger.json

@@ -0,0 +1,87 @@
+{
+  "swagger": "2.0",
+  "info": {
+    "title": "Echo Service",
+    "description": "Echo Service API consists of a single service which returns\na message.",
+    "version": "version not set"
+  },
+  "schemes": [
+    "http",
+    "https"
+  ],
+  "consumes": [
+    "application/json"
+  ],
+  "produces": [
+    "application/json"
+  ],
+  "paths": {
+    "/v1/example/echo/{id}": {
+      "post": {
+        "summary": "Echo method receives a simple message and returns it.",
+        "description": "The message posted as the id parameter will also be\nreturned.",
+        "operationId": "Echo",
+        "responses": {
+          "200": {
+            "description": "",
+            "schema": {
+              "$ref": "#/definitions/examplepbSimpleMessage"
+            }
+          }
+        },
+        "parameters": [
+          {
+            "name": "id",
+            "in": "path",
+            "required": true,
+            "type": "string",
+            "format": "string"
+          }
+        ],
+        "tags": [
+          "EchoService"
+        ]
+      }
+    },
+    "/v1/example/echo_body": {
+      "post": {
+        "summary": "EchoBody method receives a simple message and returns it.",
+        "operationId": "EchoBody",
+        "responses": {
+          "200": {
+            "description": "",
+            "schema": {
+              "$ref": "#/definitions/examplepbSimpleMessage"
+            }
+          }
+        },
+        "parameters": [
+          {
+            "name": "body",
+            "in": "body",
+            "required": true,
+            "schema": {
+              "$ref": "#/definitions/examplepbSimpleMessage"
+            }
+          }
+        ],
+        "tags": [
+          "EchoService"
+        ]
+      }
+    }
+  },
+  "definitions": {
+    "examplepbSimpleMessage": {
+      "type": "object",
+      "properties": {
+        "id": {
+          "type": "string",
+          "format": "string",
+          "description": "Id represents the message identifier."
+        }
+      },
+      "description": "SimpleMessage represents a simple message sent to the Echo service."
+    }
+  }
+}