* Added machine model, and new database relations

* Added first centralized database config and  added machine self-registration into db
* Fix database migration with new database
* Refactor

Step.Model/DatabaseModels/UserModel.cs

@@ -45,7 +45,5 @@ namespace Step.Model.DatabaseModels
 
         [Column("role_id")]
         public int RoleId { get; set; }
-        [ForeignKey("RoleId")]
-        public RoleModel Role { get; set; }
     }
 }