Fix all functions vs 'all' function. Relates to #758

Author: commonsensesoftware

src/Common/src/Common.OData.ApiExplorer/Conventions/DefaultODataQueryOptionDescriptionProvider.cs

@@ -284,7 +284,7 @@ private static void AppendAllowedOptions( StringBuilder description, ODataQueryO
         }
 
         if ( context.AllowedFunctions != AllowedFunctions.None &&
-             context.AllowedFunctions != AllowedFunctions.All )
+             context.AllowedFunctions != AllowedFunctions.AllFunctions )
         {
             description.Append( Space )
                        .AppendFormat(

src/Common/test/Common.OData.ApiExplorer.Tests/Conventions/DefaultODataQueryOptionDescriptionProviderTest.cs

@@ -250,7 +250,7 @@ public static IEnumerable<object[]> FilterDescriptionData
                 new[] { "category", "price", "quantity" },
                 AllowedLogicalOperators.All,
                 AllowedArithmeticOperators.All,
-                AllowedFunctions.All,
+                AllFunctions,
                 "Restricts the set of items returned. The allowed properties are: category, price, quantity.",
             };
         }