Added suuport to inject an IOqtaneDatabase in EntityBuilders to allow each Database to control certain Migration behaviors. Also updated Installer to dynamically build Database Configuration section

Oqtane.Server/Repository/Interfaces/IDbConfig.cs

@@ -1,5 +1,7 @@
+using System.Collections.Generic;
 using Microsoft.AspNetCore.Http;
 using Microsoft.Extensions.Configuration;
+using Oqtane.Interfaces;
 
 namespace Oqtane.Repository
 {
@@ -9,7 +11,10 @@ namespace Oqtane.Repository
 
         public IConfiguration Configuration { get; }
 
+        public IEnumerable<IOqtaneDatabase> Databases { get; set; }
+
         public string ConnectionString { get; set; }
+
         public string DatabaseType { get; set; }
     }
 }