Added missing properties for databases and server (#373)

* added get database info to admin service

* refactored code to be inline with standard

* added comments to utils functions

* added comments to public classes

* added machine name to serverinfo from connection; added last backupdate and last log backup date to database info

* removed camelcase from request type

* removed the wrapper for the generic dictionary

* removed unnecessary imports

* merged master

* changed datetime compare to equality operator

* added database compatability level to info

* renamed field

* fixed CompatibilityLevel string typo, added bakcup dates to capabilities list

src/Microsoft.SqlTools.ServiceLayer/Admin/Contracts/GetDatabaseInfoRequest.cs

@@ -26,7 +26,7 @@ namespace Microsoft.SqlTools.ServiceLayer.Admin.Contracts
         /// <summary>
         /// The object containing the database info
         /// </summary>
-        public DatabaseInfo Result { get; set; }
+        public DatabaseInfo DatabaseInfo { get; set; }
     }
 
     /// <summary>