message: fixes ReplaceKeysStartTest
diff: @@ -33,7 +33,7 @@ namespace Hyperledger.Indy.Test.SignusTests
  [TestMethod]
  public async Task TestReplaceKeysStartWorksForNotExistsDid()
  {
  - var ex = await Assert.ThrowsExceptionAsync<WalletValueNotFoundException>(() =>
  + var ex = await Assert.ThrowsExceptionAsync<WalletItemNotFoundException>(() =>
  Did.ReplaceKeysStartAsync(this.wallet, DID1, "{}")
  );
  }
  