Org admin cleanup

- Added sproc to check if org admin for free org create
- Removed old proeprties not in user from org and subvault
- Added more cascade deletes

src/Core/Models/Data/SubvaultUserPermissions.cs

@@ -6,6 +6,5 @@ namespace Bit.Core.Models.Data
     {
         public Guid SubvaultId { get; set; }
         public bool ReadOnly { get; set; }
-        public bool Admin { get; set; }
     }
 }

src/Core/Models/Data/SubvaultUserSubvaultDetails.cs

@@ -9,6 +9,5 @@ namespace Bit.Core.Models.Data
         public string Name { get; set; }
         public Guid SubvaultId { get; set; }
         public bool ReadOnly { get; set; }
-        public bool Admin { get; set; }
     }
 }

src/Core/Models/Data/SubvaultUserUserDetails.cs

@@ -12,6 +12,5 @@ namespace Bit.Core.Models.Data
         public Enums.OrganizationUserStatusType Status { get; set; }
         public Enums.OrganizationUserType Type { get; set; }
         public bool ReadOnly { get; set; }
-        public bool Admin { get; set; }
     }
 }