message: Fix broken create pool test.
diff: @@ -11,24 +11,17 @@ namespace Hyperledger.Indy.Test.PoolTests
  [TestMethod]
  public async Task TestCreatePoolWorksForNullConfig()
  {
  - var txnFile = "testCreatePoolWorks.txn";
  + var file = File.Create("testCreatePoolWorks.txn");
  + PoolUtils.WriteTransactions(file, 1);
  - try
  - {
  - File.Create(txnFile).Dispose();
  await Pool.CreatePoolLedgerConfigAsync("testCreatePoolWorks", null);
  }
  - finally
  - {
  - File.Delete(txnFile);
  - }
  - }
  [TestMethod]
  public async Task TestCreatePoolWorksForConfigJSON()
  {
  var genesisTxnFile = PoolUtils.CreateGenesisTxnFile("genesis.txn");
  - var path = Path.GetFullPath(genesisTxnFile).Replace('\\', '/');
  + var path = Path.GetFullPath(genesisTxnFile.Name).Replace('\\', '/');
  var configJson = string.Format("{{\"genesis_txn\":\"{0}\"}}", path);
  @@ -40,8 +33,7 @@ namespace Hyperledger.Indy.Test.PoolTests
  {
  var genesisTxnFile = PoolUtils.CreateGenesisTxnFile("genesis.txn");
  -
  - var path = Path.GetFullPath(genesisTxnFile).Replace('\\', '/');
  + var path = Path.GetFullPath(genesisTxnFile.Name).Replace('\\', '/');
  var configJson = string.Format("{{\"genesis_txn\":\"{0}\"}}", path);
  