api: Add missing GET teams endpoints (#5382)

* api: Add an endpoint to list a particular member of team.

* models: Rename `GetUserTeams()` to `GetUserOrgTeams()` in `org_team` model.

`GetUserTeams()` sounds a bit misnomer since it actually returns
the teams that user belongs to in a given organization rather than
all the teams across all the organization that the user has joined.

* models: Add `GetUserTeams()`.

Returns all the teams that a user belongs to.

* api: Add an endpoint for GET '/user/teams'.

A GET request to this endpoint lists all the teams that a user
belongs to.

templates/swagger/v1_json.tmpl

@@ -4629,6 +4629,38 @@
       }
     },
     "/teams/{id}/members/{username}": {
+      "get": {
+        "produces": [
+          "application/json"
+        ],
+        "tags": [
+          "organization"
+        ],
+        "summary": "List a particular member of team",
+        "operationId": "orgListTeamMember",
+        "parameters": [
+          {
+            "type": "integer",
+            "format": "int64",
+            "description": "id of the team",
+            "name": "id",
+            "in": "path",
+            "required": true
+          },
+          {
+            "type": "string",
+            "description": "username of the member to list",
+            "name": "username",
+            "in": "path",
+            "required": true
+          }
+        ],
+        "responses": {
+          "200": {
+            "$ref": "#/responses/User"
+          }
+        }
+      },
       "put": {
         "produces": [
           "application/json"
@@ -5418,6 +5450,23 @@
         }
       }
     },
+    "/user/teams": {
+      "get": {
+        "produces": [
+          "application/json"
+        ],
+        "tags": [
+          "user"
+        ],
+        "summary": "List all the teams a user belongs to",
+        "operationId": "userListTeams",
+        "responses": {
+          "200": {
+            "$ref": "#/responses/TeamList"
+          }
+        }
+      }
+    },
     "/user/times": {
       "get": {
         "produces": [
@@ -7942,6 +7991,9 @@
           "type": "string",
           "x-go-name": "Name"
         },
+        "organization": {
+          "$ref": "#/definitions/Organization"
+        },
         "permission": {
           "type": "string",
           "enum": [