Rename DefaultGroup options to DefaultGroupName

src/DotNetCore.CAP/Internal/IConsumerServiceSelector.Default.cs

@@ -173,7 +173,7 @@ namespace DotNetCore.CAP.Internal
             var prefix = !string.IsNullOrEmpty(_capOptions.GroupNamePrefix)
                 ? $"{_capOptions.GroupNamePrefix}."
                 : string.Empty;
-            attribute.Group =  $"{prefix}{attribute.Group ?? _capOptions.DefaultGroup}.{_capOptions.Version}";
+            attribute.Group =  $"{prefix}{attribute.Group ?? _capOptions.DefaultGroupName}.{_capOptions.Version}";
         }
 
         private ConsumerExecutorDescriptor InitDescriptor(

test/DotNetCore.CAP.Test/CustomConsumerSubscribeTest.cs

@@ -104,7 +104,7 @@ namespace DotNetCore.CAP.Test
                 {
                     if (attr.Group == null)
                     {
-                        attr.Group = _capOptions.DefaultGroup + "." + _capOptions.Version;
+                        attr.Group = _capOptions.DefaultGroupName + "." + _capOptions.Version;
                     }
                     else
                     {