Restricting team stats using the VIEW_MEMBERS restrictions (#11694)

* Restricting team stats using the VIEW_MEMBERS restrictions

* Adding tests

* fixing tests

app/plugin_api.go

@@ -189,7 +189,7 @@ func (api *PluginAPI) UpdateTeamMemberRoles(teamId, userId, newRoles string) (*m
 }
 
 func (api *PluginAPI) GetTeamStats(teamId string) (*model.TeamStats, *model.AppError) {
-	return api.app.GetTeamStats(teamId)
+	return api.app.GetTeamStats(teamId, nil)
 }
 
 func (api *PluginAPI) CreateUser(user *model.User) (*model.User, *model.AppError) {