LoadConfigRoot doesn't handle config entries with null values

[VitalyDukhota]

There is a bug/issue in the .NET client for the new Ads API beta: ConfigBase.cs, LoadConfigRoot(IConfigurationRoot configurationRoot) method, line 57:

setting => setting.Value.ToString());

The problem is that setting.Value can for some config files be null, which is not handled correctly. Example - JSON configs with hierarchy, where a section name creates an entry in the config file, but it doesn't have a value.

[AnashOommen]

Fixed in v0.7.1.