New: Guest Role

coscine/issues#2287
coscine/issues#2374

DO NOT MERGE UNTIL EPIC IS DONE

src/Database/Models/ActivatedFeaturesModel.cs

@@ -42,10 +42,10 @@ namespace Coscine.Database.Models
             if (!IsFeatureActive(projectId, featureId))
             {
                 Insert(new ActivatedFeature
-                    {
-                        ProjectId = projectId,
-                        FeatureId = featureId
-                    });
+                {
+                    ProjectId = projectId,
+                    FeatureId = featureId
+                });
             }
         }
 
@@ -53,11 +53,12 @@ namespace Coscine.Database.Models
         {
             if (IsFeatureActive(projectId, featureId))
             {
-                foreach(var feature in GetAllWhere((activatedFeatures) => activatedFeatures.FeatureId == featureId
-                        && activatedFeatures.ProjectId == projectId)) {
+                foreach (var feature in GetAllWhere((activatedFeatures) => activatedFeatures.FeatureId == featureId
+                        && activatedFeatures.ProjectId == projectId))
+                {
                     Delete(feature);
                 }
-                
+
             }
         }