Increased the time again (coscine/issues#1476)

src/Action/Utils/SharePointEventUtil.cs

@@ -18,7 +18,7 @@ namespace Coscine.Api.LegacySharePoint.Models
             {
                 _httpClient = new HttpClient
                 {
-                    Timeout = TimeSpan.FromSeconds(10)
+                    Timeout = TimeSpan.FromMinutes(30)
                 };
             }
             return _httpClient;