Removing Prefix validation in multi tenancy

No prefix means wildcard fall back

--HG--
branch : 1.x

src/Orchard.Specs/MultiTenancy.feature.cs

@@ -2,7 +2,7 @@
 //  <auto-generated>
 //      This code was generated by SpecFlow (http://www.specflow.org/).
 //      SpecFlow Version:1.5.0.0
-//      Runtime Version:4.0.30319.1
+//      Runtime Version:4.0.30319.225
 // 
 //      Changes to this file may cause incorrect behavior and will be lost if
 //      the code is regenerated.

src/Orchard.Web/Modules/Orchard.MultiTenancy/ViewModels/TenantAddViewModel.cs

@@ -10,7 +10,6 @@ namespace Orchard.MultiTenancy.ViewModels {
 
         [Required]
         public string Name { get; set; }
-        [Required]
         public string RequestUrlHost { get; set; }
         public string RequestUrlPrefix { get; set; }
         public string DataProvider { get; set; }

src/Orchard.Web/Modules/Orchard.MultiTenancy/ViewModels/TenantEditViewModel.cs

@@ -6,7 +6,6 @@ namespace Orchard.MultiTenancy.ViewModels {
     public class TenantEditViewModel  {
         [Required]
         public string Name { get; set; }
-        [Required]
         public string RequestUrlHost { get; set; }
         public string RequestUrlPrefix { get; set; }
         public string DataProvider { get; set; }