message: InMem wallet incorrectly used static list of records.
diff: @@ -9,7 +9,7 @@ namespace Indy.Sdk.Dotnet.Test.Wrapper.WalletTests
  {
  public class InMemWallet : ICustomWallet
  {
  - private static IDictionary<string, WalletRecord> _records = new Dictionary<string, WalletRecord>();
  + private IDictionary<string, WalletRecord> _records = new Dictionary<string, WalletRecord>();
  private TimeSpan _freshnessDuration;
  public InMemWallet(TimeSpan freshnessDuration)
  