ZooFlow/EDMIService: clean up, fix column names in sql

Service.EDMIService/Methods/AttributeValue.vb

@@ -16,6 +16,10 @@
         Public Overrides Function ToString() As String
             Return Name
         End Function
+
+        Public Overrides Function GetHashCode() As Integer
+            Return Name.GetHashCode()
+        End Function
     End Class
 
     Public Class AutoAttributeValue