Bug Fix: Update Admins blocked all Admins

The updated subject hash was case-sensitive when it should have been
reinitialized with the OrdinalIgnoreCase string comparer.

Disco.Services/Authorization/Roles/RoleCache.cs

@@ -91,7 +91,7 @@ namespace Disco.Services.Authorization.Roles
 
             // Update State
             _AdministratorToken.SubjectIds = SubjectIds.ToList();
-            _AdministratorToken.SubjectIdHashes = new HashSet<string>(SubjectIds.Select(i => i.ToLower()));
+            _AdministratorToken.SubjectIdHashes = new HashSet<string>(SubjectIds, StringComparer.OrdinalIgnoreCase);
         }
 
         /// <summary>

Disco.Services/Authorization/Roles/RoleToken.cs

@@ -30,7 +30,7 @@ namespace Disco.Services.Authorization.Roles
             return new RoleToken()
             {
                 Role = Role,
-                SubjectIdHashes = new HashSet<string>(sg.Select(i => i.ToLower()), StringComparer.OrdinalIgnoreCase),
+                SubjectIdHashes = new HashSet<string>(sg, StringComparer.OrdinalIgnoreCase),
                 SubjectIds = sg.ToList(),
                 Claims = Claims
             };